/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Anchor = Container.expand(function () {
	var self = Container.call(this);
	// Create anchor graphic
	var anchorGraphics = self.attachAsset('anchor', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 10
	});
	self.isBlue = true; // true = blue (stop), false = orange (move)
	self.damage = 6;
	self.lastX = 0;
	self.lastY = 0;
	self.colorChangeTimer = 0;
	self.colorChangeInterval = 180; // Change color every 3 seconds at 60fps
	self.speed = 3;
	self.movingRight = true;
	// Update anchor color
	self.updateColor = function () {
		if (self.isBlue) {
			anchorGraphics.tint = 0x0066ff; // Blue
		} else {
			anchorGraphics.tint = 0xff6600; // Orange
		}
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		// Move horizontally within the box boundaries
		var anchorHalfWidth = 60; // Half of 120px anchor width
		var minX = boxX + 8 + anchorHalfWidth;
		var maxX = boxX + boxWidth - 8 - anchorHalfWidth;
		if (self.movingRight) {
			self.x += self.speed; // Move right
			if (self.x >= maxX) {
				self.x = maxX;
				self.movingRight = false; // Switch to moving left
			}
		} else {
			self.x -= self.speed; // Move left
			if (self.x <= minX) {
				self.x = minX;
				self.movingRight = true; // Switch to moving right
			}
		}
		// Keep anchor within vertical bounds of the box
		var anchorHalfHeight = 600; // Half of 1200px anchor height
		var minY = boxY + 8 + anchorHalfHeight;
		var maxY = boxY + boxHeight - 8 - anchorHalfHeight;
		if (self.y < minY) {
			self.y = minY;
		}
		if (self.y > maxY) {
			self.y = maxY;
		}
		// Change color periodically
		self.colorChangeTimer++;
		if (self.colorChangeTimer >= self.colorChangeInterval) {
			self.isBlue = !self.isBlue;
			self.updateColor();
			self.colorChangeTimer = 0;
		}
	};
	// Initialize with blue color
	self.updateColor();
	return self;
});
var Asgore = Container.expand(function () {
	var self = Container.call(this);
	// Create Asgore using proper Asgore image asset
	var asgoreGraphics = self.attachAsset('asgore', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 1
	});
	self.attackTimer = 0;
	self.attackInterval = 240; // Attack every 4 seconds
	self.blocksLeft = 12;
	self.isDead = false;
	self.block = function () {
		if (self.blocksLeft > 0 && !self.isDead) {
			self.blocksLeft--;
			// Flash blue to indicate block
			tween(asgoreGraphics, {
				tint: 0x0066ff
			}, {
				duration: 100,
				onFinish: function onFinish() {
					tween(asgoreGraphics, {
						tint: 0xffffff
					}, {
						duration: 100
					});
				}
			});
			if (self.blocksLeft <= 0) {
				self.isDead = true;
				tween(asgoreGraphics, {
					alpha: 0.3
				}, {
					duration: 500
				});
			}
			return true;
		}
		return false;
	};
	return self;
});
var BoxBoundary = Container.expand(function () {
	var self = Container.call(this);
	// Create four walls for the box
	var topWall = self.attachAsset('boxBorder', {
		anchorX: 0,
		anchorY: 0,
		width: 1600,
		height: 8
	});
	var bottomWall = self.attachAsset('boxBorder', {
		anchorX: 0,
		anchorY: 0,
		width: 1600,
		height: 8
	});
	var leftWall = self.attachAsset('boxBorder', {
		anchorX: 0,
		anchorY: 0,
		width: 8,
		height: 1200
	});
	var rightWall = self.attachAsset('boxBorder', {
		anchorX: 0,
		anchorY: 0,
		width: 8,
		height: 1200
	});
	// Position walls
	topWall.x = 0;
	topWall.y = 0;
	bottomWall.x = 0;
	bottomWall.y = 1200 - 8;
	leftWall.x = 0;
	leftWall.y = 0;
	rightWall.x = 1600 - 8;
	rightWall.y = 0;
	return self;
});
var Flowey = Container.expand(function () {
	var self = Container.call(this);
	// Create Flowey using proper Flowey image asset
	var floweyGraphics = self.attachAsset('flowey', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 1
	});
	self.attackTimer = 0;
	self.attackInterval = 600; // Attack every 10 seconds
	self.destroysLeft = 999; // Infinite until transformation
	self.finalFormDestroysLeft = 5;
	self.isFinalForm = false;
	self.isDead = false;
	self.destroyAttack = function () {
		if (self.isDead) return false;
		var destroysToUse = self.isFinalForm ? self.finalFormDestroysLeft : self.destroysLeft;
		if (destroysToUse > 0) {
			if (self.isFinalForm) {
				self.finalFormDestroysLeft--;
				if (self.finalFormDestroysLeft <= 0) {
					self.isDead = true;
					tween(floweyGraphics, {
						alpha: 0.3
					}, {
						duration: 500
					});
				}
			}
			// Flash red to indicate destruction
			tween(floweyGraphics, {
				tint: 0xff0000
			}, {
				duration: 100,
				onFinish: function onFinish() {
					tween(floweyGraphics, {
						tint: 0xffffff
					}, {
						duration: 100
					});
				}
			});
			return true;
		}
		return false;
	};
	self.transformToFinalForm = function () {
		if (!self.isFinalForm) {
			self.isFinalForm = true;
			self.attackInterval = 300; // Attack more frequently
			// Transform animation
			tween(floweyGraphics, {
				scaleX: 1.5,
				scaleY: 1.5,
				tint: 0xff00ff
			}, {
				duration: 1000,
				easing: tween.easeOut
			});
		}
	};
	return self;
});
var GasterBeam = Container.expand(function () {
	var self = Container.call(this);
	// Create black border first (behind white beam)
	var beamBorder = self.attachAsset('beamBorder', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Create white beam on top
	var whiteBeam = self.attachAsset('whiteBeam', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.damage = 12; // Gaster beam damage
	self.speed = 4;
	self.lastX = 0;
	self.lastY = 0;
	self.targetX = 0;
	self.targetY = 0;
	self.isActive = false;
	self.fireBeam = function (targetX, targetY) {
		if (self.isActive) return;
		self.isActive = true;
		self.targetX = targetX;
		self.targetY = targetY;
		// Calculate direction to target
		var deltaX = targetX - self.x;
		var deltaY = targetY - self.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		// Set rotation to point towards target
		self.rotation = Math.atan2(deltaY, deltaX) + Math.PI / 2; // Add 90 degrees because beam asset points up
		// Move towards target
		tween(self, {
			x: targetX,
			y: targetY
		}, {
			duration: distance / self.speed * 16,
			// Adjust duration based on distance
			easing: tween.linear,
			onFinish: function onFinish() {
				self.isActive = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
var GasterBlaster = Container.expand(function () {
	var self = Container.call(this);
	// Create Gaster Blaster using image asset
	var blasterGraphics = self.attachAsset('gasterBlaster', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 1
	});
	self.chargeTime = 60; // 1 second charge time at 60fps
	self.chargeTimer = 0;
	self.isCharging = false;
	self.isReady = false;
	self.beamDuration = 120; // 2 seconds beam duration
	self.beamTimer = 0;
	self.targetX = 0;
	self.targetY = 0;
	self.startCharge = function (targetX, targetY) {
		if (self.isCharging || self.isReady) return;
		self.isCharging = true;
		self.targetX = targetX;
		self.targetY = targetY;
		self.chargeTimer = 0;
		// Point towards target during charge
		var deltaX = targetX - self.x;
		var deltaY = targetY - self.y;
		self.rotation = Math.atan2(deltaY, deltaX);
		// Flash effect during charge
		tween(blasterGraphics, {
			alpha: 0.3
		}, {
			duration: 100,
			easing: tween.linear,
			onFinish: function onFinish() {
				tween(blasterGraphics, {
					alpha: 1
				}, {
					duration: 100,
					easing: tween.linear
				});
			}
		});
	};
	self.fireBeam = function () {
		if (!self.isReady) return null;
		var beam = new GasterBeam();
		beam.x = self.x;
		beam.y = self.y;
		beam.lastX = beam.x;
		beam.lastY = beam.y;
		beam.fireBeam(self.targetX, self.targetY);
		return beam;
	};
	self.update = function () {
		if (self.isCharging) {
			self.chargeTimer++;
			if (self.chargeTimer >= self.chargeTime) {
				self.isCharging = false;
				self.isReady = true;
				self.beamTimer = 0;
			}
		} else if (self.isReady) {
			self.beamTimer++;
			if (self.beamTimer >= self.beamDuration) {
				self.isReady = false;
			}
		}
	};
	return self;
});
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var blueHeartGraphics = self.attachAsset('blueHeart', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.isBlue = false;
	self.velocityY = 0;
	self.gravity = 0.3;
	self.jumpPower = -18;
	self.onGround = false;
	self.groundY = 0;
	self.setBlueMode = function (isBlue) {
		self.isBlue = isBlue;
		if (isBlue) {
			heartGraphics.alpha = 0;
			blueHeartGraphics.alpha = 1;
		} else {
			heartGraphics.alpha = 1;
			blueHeartGraphics.alpha = 0;
		}
	};
	return self;
});
var Ivy = Container.expand(function () {
	var self = Container.call(this);
	// Create ivy graphic - anchor from top to hang down
	var ivyGraphics = self.attachAsset('ivy', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.damage = 5;
	self.speed = 3;
	self.lastX = 0;
	self.lastY = 0;
	self.movingRight = true;
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		// Move downward from top to bottom of box
		self.y += self.speed; // Always move down
	};
	return self;
});
var Sans = Container.expand(function () {
	var self = Container.call(this);
	// Create Sans using proper Sans image asset
	var sansGraphics = self.attachAsset('sans', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 1
	});
	self.attackTimer = 0;
	self.attackInterval = 720; // Attack every 12 seconds
	self.dodgesLeft = 10;
	self.isDead = false;
	self.originalX = 0;
	self.originalY = 0;
	self.dodge = function () {
		if (self.dodgesLeft > 0 && !self.isDead) {
			self.dodgesLeft--;
			// Move to random position near original location
			var dodgeDistance = 100;
			var angle = Math.random() * Math.PI * 2;
			var newX = self.originalX + Math.cos(angle) * dodgeDistance;
			var newY = self.originalY + Math.sin(angle) * dodgeDistance;
			tween(self, {
				x: newX,
				y: newY
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					// Return to original position
					tween(self, {
						x: self.originalX,
						y: self.originalY
					}, {
						duration: 300,
						easing: tween.easeIn
					});
				}
			});
			if (self.dodgesLeft <= 0) {
				self.isDead = true;
				tween(sansGraphics, {
					alpha: 0.3
				}, {
					duration: 500
				});
			}
			return true;
		}
		return false;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf0f8ff
});

/**** 
* Game Code
****/ 
// Box dimensions
var boxX = 224; // Center the 1600px box in 2048px screen
var boxY = 766; // Center the 1200px box in 2732px screen
var boxWidth = 1600;
var boxHeight = 1200;
// Create box boundary
var boundary = game.addChild(new BoxBoundary());
boundary.x = boxX;
boundary.y = boxY;
// Create heart character
var heart = game.addChild(new Heart());
heart.x = boxX + boxWidth / 2; // Center of box
heart.y = boxY + boxHeight / 2; // Center of box
// Create the three characters
// Sans on the left side (bone thrower)
var sans = game.addChild(new Sans());
sans.x = boxX - 150; // Left side of box
sans.y = boxY + boxHeight / 2; // Middle height
// Asgore in the middle (anchor owner)
var asgore = game.addChild(new Asgore());
asgore.x = boxX + boxWidth / 2; // Center of box horizontally
asgore.y = boxY - 150; // Above the box
// Flowey on the right side (ivy sender)
var flowey = game.addChild(new Flowey());
flowey.x = boxX + boxWidth + 150; // Right side of box
flowey.y = boxY + boxHeight / 2; // Middle height
// Create lives display
var livesTxt = new Text2('Lives: 92', {
	size: 80,
	fill: 0x000000
});
livesTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(livesTxt);
// Create timer display
var gameTime = 900; // 15 minutes in seconds
var timerTxt = new Text2('Time: 15:00', {
	size: 80,
	fill: 0x000000
});
timerTxt.anchor.set(1, 0); // Right align
LK.gui.topRight.addChild(timerTxt);
// Create "THREE LEFT" text in red under timer
var threeTxt = new Text2('THREE LEFT', {
	size: 60,
	fill: 0xff0000
});
threeTxt.anchor.set(1, 0); // Right align
threeTxt.y = 100; // Position below timer
LK.gui.topRight.addChild(threeTxt);
// Store original positions for characters
sans.originalX = sans.x;
sans.originalY = sans.y;
// Dragging variables
var isDragging = false;
var dragOffsetX = 0;
var dragOffsetY = 0;
// Constraint function to keep heart within boundaries
function constrainHeartPosition() {
	var heartRadius = 50; // Half of heart width/height
	// Left boundary
	if (heart.x - heartRadius < boxX + 8) {
		heart.x = boxX + 8 + heartRadius;
	}
	// Right boundary
	if (heart.x + heartRadius > boxX + boxWidth - 8) {
		heart.x = boxX + boxWidth - 8 - heartRadius;
	}
	// Top boundary
	if (heart.y - heartRadius < boxY + 8) {
		heart.y = boxY + 8 + heartRadius;
	}
	// Bottom boundary
	if (heart.y + heartRadius > boxY + boxHeight - 8) {
		heart.y = boxY + boxHeight - 8 - heartRadius;
	}
}
// Player control variables
var targetX = 0;
var targetY = 0;
var isPlayerControlling = false;
// Touch/mouse down event
game.down = function (x, y, obj) {
	isPlayerControlling = true;
	targetX = x;
	targetY = y;
};
// Touch/mouse move event
game.move = function (x, y, obj) {
	if (isPlayerControlling) {
		targetX = x;
		targetY = y;
	}
};
// Touch/mouse up event
game.up = function (x, y, obj) {
	isPlayerControlling = false;
};
// Lives system
var lives = 92;
// Movement variables
var heartSpeed = 8;
var movementDirection = {
	x: 1,
	y: 0.5
}; // Initial movement direction
var lastDirectionChangeTime = 0;
var directionChangeInterval = 2000; // Change direction every 2 seconds
// Gaster Blaster and beam system
var gasterBlasters = [];
var gasterBeams = [];
var maxBlasters = 10;
var blasterSpawnTimer = 0;
var blasterSpawnInterval = 720; // Spawn every 12 seconds at 60fps
var waveIntensity = 1;
// Anchor system
var anchors = [];
var maxAnchors = 2;
var anchorSpawnTimer = 0;
var anchorSpawnInterval = 240; // Spawn every 4 seconds at 60fps
// Ivy system
var ivies = [];
var maxIvies = 5;
var ivySpawnTimer = 0;
var ivySpawnInterval = 600; // Spawn every 10 seconds at 60fps
// Slow effect system
var isSlowed = false;
var slowEndTime = 0;
var normalHeartSpeed = 8;
// Function to spawn a new Gaster Blaster at random edge position
function spawnGasterBlaster() {
	if (gasterBlasters.length >= maxBlasters) return;
	var blaster = new GasterBlaster();
	var edge = Math.floor(Math.random() * 4); // 0=top, 1=right, 2=bottom, 3=left
	// Position blaster at random point on selected edge
	switch (edge) {
		case 0:
			// Top edge
			blaster.x = boxX + Math.random() * boxWidth;
			blaster.y = boxY - 100;
			break;
		case 1:
			// Right edge
			blaster.x = boxX + boxWidth + 100;
			blaster.y = boxY + Math.random() * boxHeight;
			break;
		case 2:
			// Bottom edge
			blaster.x = boxX + Math.random() * boxWidth;
			blaster.y = boxY + boxHeight + 100;
			break;
		case 3:
			// Left edge
			blaster.x = boxX - 100;
			blaster.y = boxY + Math.random() * boxHeight;
			break;
	}
	gasterBlasters.push(blaster);
	game.addChild(blaster);
	// Start charging to attack the heart
	blaster.startCharge(heart.x, heart.y);
}
// Function to spawn a new anchor at random position within the box
function spawnAnchor() {
	if (anchors.length >= maxAnchors) return;
	var anchor = new Anchor();
	// Position anchor within the box boundaries for horizontal movement
	var anchorHalfWidth = 60; // Half of 120px anchor width
	var startFromLeft = Math.random() < 0.5;
	if (startFromLeft) {
		anchor.x = boxX + 8 + anchorHalfWidth; // Start from left edge inside box
		anchor.movingRight = true; // Moving right
	} else {
		anchor.x = boxX + boxWidth - 8 - anchorHalfWidth; // Start from right edge inside box
		anchor.movingRight = false; // Moving left
	}
	// Random Y position within the box, constrained to keep full anchor height inside
	var anchorHalfHeight = 600; // Half of 1200px anchor height
	anchor.y = boxY + anchorHalfHeight + Math.random() * (boxHeight - 2 * anchorHalfHeight);
	anchor.lastX = anchor.x;
	anchor.lastY = anchor.y;
	anchors.push(anchor);
	game.addChild(anchor);
}
// Function to spawn a new ivy hanging from top of box like an anchor
function spawnIvy() {
	if (ivies.length >= maxIvies) return;
	var ivy = new Ivy();
	// Position ivy at the very top of box to move downward (anchor point is at top of ivy)
	ivy.y = boxY + 8; // Start from top edge inside box
	// Random X position within the box, constrained to keep full ivy width inside
	var ivyHalfWidth = 60; // Half of 120px ivy width
	ivy.x = boxX + ivyHalfWidth + Math.random() * (boxWidth - 2 * ivyHalfWidth);
	ivy.lastX = ivy.x;
	ivy.lastY = ivy.y;
	ivies.push(ivy);
	game.addChild(ivy);
}
// Game update loop
game.update = function () {
	// Update timer every second (60 ticks = 1 second at 60fps)
	if (LK.ticks % 60 === 0 && gameTime > 0) {
		gameTime--;
		var minutes = Math.floor(gameTime / 60);
		var seconds = gameTime % 60;
		var timeString = minutes + ':' + (seconds < 10 ? '0' : '') + seconds;
		timerTxt.setText('Time: ' + timeString);
	}
	// Check if Sans and Asgore are both dead for Flowey transformation
	if (sans.isDead && asgore.isDead && !flowey.isFinalForm && !flowey.isDead) {
		flowey.transformToFinalForm();
		// Update ivy system for final form
		maxIvies = 10;
		flowey.attackInterval = 300;
	}
	// Increase wave intensity over time
	if (LK.ticks % 600 === 0) {
		// Every 10 seconds
		waveIntensity = Math.min(waveIntensity + 0.5, 4);
		maxBlasters = Math.min(Math.floor(2 + waveIntensity), 10);
		blasterSpawnInterval = Math.max(Math.floor(720 - waveIntensity * 120), 300);
	}
	// Update Sans attack timer and spawn Gaster Blasters (only if alive)
	if (!sans.isDead) {
		sans.attackTimer++;
		if (sans.attackTimer >= sans.attackInterval) {
			// Sans attack: make heart blue and enable physics
			heart.setBlueMode(true);
			heart.velocityY = 0;
			heart.onGround = false;
			heart.groundY = boxY + boxHeight - 8 - 50; // Ground level accounting for heart radius
			// Sans spawns Gaster Blasters
			var spawnCount = Math.random() < 0.4 ? Math.floor(waveIntensity) : 1;
			for (var s = 0; s < spawnCount && gasterBlasters.length < maxBlasters; s++) {
				spawnGasterBlaster();
			}
			sans.attackTimer = 0;
		}
	}
	// Update Asgore attack timer and spawn anchors (only if alive)
	if (!asgore.isDead) {
		asgore.attackTimer++;
		if (asgore.attackTimer >= asgore.attackInterval) {
			// Asgore sends anchors
			spawnAnchor();
			asgore.attackTimer = 0;
		}
	}
	// Update Flowey attack timer and spawn ivies (only if alive)
	if (!flowey.isDead) {
		flowey.attackTimer++;
		if (flowey.attackTimer >= flowey.attackInterval) {
			// Flowey sends ivies
			var spawnCount = flowey.isFinalForm ? 10 : Math.floor(Math.random() * 2) + 2; // Final form sends 10, normal sends 2-3
			for (var i = 0; i < spawnCount && ivies.length < maxIvies; i++) {
				spawnIvy();
			}
			flowey.attackTimer = 0;
		}
	}
	// Handle slow effect expiry
	if (isSlowed && LK.ticks >= slowEndTime) {
		isSlowed = false;
		heartSpeed = normalHeartSpeed;
	}
	// Update all Gaster Blasters and spawn beams when ready
	for (var i = gasterBlasters.length - 1; i >= 0; i--) {
		var blaster = gasterBlasters[i];
		// Check if blaster is ready to fire
		if (blaster.isReady && blaster.beamTimer === 0) {
			var beam = blaster.fireBeam();
			if (beam) {
				gasterBeams.push(beam);
				game.addChild(beam);
			}
		}
		// Remove blasters that have finished their attack cycle
		if (!blaster.isCharging && !blaster.isReady) {
			blaster.destroy();
			gasterBlasters.splice(i, 1);
			continue;
		}
	}
	// Update all beams and check for collisions
	for (var j = gasterBeams.length - 1; j >= 0; j--) {
		var beam = gasterBeams[j];
		// Check if beam hit the heart
		if (beam.intersects(heart)) {
			// Reduce lives by beam damage (12)
			lives -= beam.damage;
			livesTxt.setText('Lives: ' + lives);
			// Flash screen white to indicate beam damage
			LK.effects.flashScreen(0xffffff, 600);
			// Check for game over
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			// Remove the beam that hit us
			beam.destroy();
			gasterBeams.splice(j, 1);
			continue;
		}
		// Remove beams that are too far from the play area or inactive
		var distanceFromCenter = Math.sqrt(Math.pow(beam.x - (boxX + boxWidth / 2), 2) + Math.pow(beam.y - (boxY + boxHeight / 2), 2));
		if (distanceFromCenter > 2000 || !beam.isActive) {
			beam.destroy();
			gasterBeams.splice(j, 1);
			continue;
		}
	}
	// Update all anchors and check for collisions
	for (var j = anchors.length - 1; j >= 0; j--) {
		var anchor = anchors[j];
		// Removed health decrease timer initialization
		// Removed anchor-based health decrease mechanic
		// Check if anchor hit the heart
		if (anchor.intersects(heart)) {
			var shouldTakeDamage = false;
			// Blue anchor: damage if player is moving
			if (anchor.isBlue && isPlayerControlling) {
				shouldTakeDamage = true;
			}
			// Orange anchor: damage if player is not moving
			else if (!anchor.isBlue && !isPlayerControlling) {
				shouldTakeDamage = true;
			}
			if (shouldTakeDamage) {
				// Reduce lives by anchor damage (2)
				lives -= anchor.damage;
				livesTxt.setText('Lives: ' + lives);
				// Flash screen purple to indicate anchor damage
				LK.effects.flashScreen(0x8800ff, 700);
				// Check for game over
				if (lives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			// Remove the anchor that hit us
			anchor.destroy();
			anchors.splice(j, 1);
			continue;
		}
		// Anchors now stay within box bounds, so no need to remove them for going off screen
		// They will only be removed when hitting the heart
	}
	// Update all ivies and check for collisions
	for (var k = ivies.length - 1; k >= 0; k--) {
		var ivy = ivies[k];
		// Check if ivy hit the heart
		if (ivy.intersects(heart)) {
			// Reduce lives by 5
			lives -= ivy.damage;
			livesTxt.setText('Lives: ' + lives);
			// Apply slow effect (25% speed reduction)
			isSlowed = true;
			heartSpeed = normalHeartSpeed * 0.75;
			slowEndTime = LK.ticks + 300; // Slow for 5 seconds at 60fps
			// Flash screen green to indicate ivy damage and slow
			LK.effects.flashScreen(0x00ff00, 600);
			// Check for game over
			if (lives <= 0) {
				LK.showGameOver();
				return;
			}
			// Remove the ivy that hit us
			ivy.destroy();
			ivies.splice(k, 1);
			continue;
		}
		// Remove ivies that have reached the bottom of the box
		// Since ivy anchor is at top (anchorY: 0), check when ivy top + height reaches bottom
		if (ivy.y + 800 >= boxY + boxHeight - 8) {
			ivy.destroy();
			ivies.splice(k, 1);
			continue;
		}
	}
	if (isPlayerControlling) {
		if (heart.isBlue) {
			// Blue heart physics: left/right movement and jumping
			var deltaX = targetX - heart.x;
			// Horizontal movement
			if (Math.abs(deltaX) > 5) {
				var horizontalDirection = deltaX > 0 ? 1 : -1;
				heart.x += horizontalDirection * heartSpeed;
			}
			// Jump if touching upward and on ground
			if (targetY < heart.y - 20 && heart.onGround) {
				heart.velocityY = heart.jumpPower;
				heart.onGround = false;
			}
		} else {
			// Normal movement when not blue
			// Calculate direction toward target
			var deltaX = targetX - heart.x;
			var deltaY = targetY - heart.y;
			var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
			// Move toward target if not already there
			if (distance > 5) {
				// Normalize direction and apply speed
				movementDirection.x = deltaX / distance;
				movementDirection.y = deltaY / distance;
				heart.x += movementDirection.x * heartSpeed;
				heart.y += movementDirection.y * heartSpeed;
			}
		}
	}
	// Apply blue heart physics
	if (heart.isBlue) {
		// Apply gravity
		heart.velocityY += heart.gravity;
		heart.y += heart.velocityY;
		// Ground collision
		if (heart.y >= heart.groundY) {
			heart.y = heart.groundY;
			heart.velocityY = 0;
			heart.onGround = true;
		}
		// Reset blue heart after 4 seconds
		if (sans.attackTimer > 240) {
			// 4 seconds at 60fps
			heart.setBlueMode(false);
			sans.attackTimer = 0; // Reset timer to prevent staying blue
		}
	}
	// Ensure heart stays within bounds each frame
	constrainHeartPosition();
};

===================================================================
--- original.js
+++ change.js
@@ -342,14 +342,29 @@
 	var heartGraphics = self.attachAsset('heart', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
+	var blueHeartGraphics = self.attachAsset('blueHeart', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		alpha: 0
+	});
 	self.isBlue = false;
 	self.velocityY = 0;
 	self.gravity = 0.3;
 	self.jumpPower = -18;
 	self.onGround = false;
 	self.groundY = 0;
+	self.setBlueMode = function (isBlue) {
+		self.isBlue = isBlue;
+		if (isBlue) {
+			heartGraphics.alpha = 0;
+			blueHeartGraphics.alpha = 1;
+		} else {
+			heartGraphics.alpha = 1;
+			blueHeartGraphics.alpha = 0;
+		}
+	};
 	return self;
 });
 var Ivy = Container.expand(function () {
 	var self = Container.call(this);
@@ -661,18 +676,12 @@
 	if (!sans.isDead) {
 		sans.attackTimer++;
 		if (sans.attackTimer >= sans.attackInterval) {
 			// Sans attack: make heart blue and enable physics
-			heart.isBlue = true;
+			heart.setBlueMode(true);
 			heart.velocityY = 0;
 			heart.onGround = false;
 			heart.groundY = boxY + boxHeight - 8 - 50; // Ground level accounting for heart radius
-			// Tween heart to blue color
-			tween(heart, {
-				tint: 0x0066ff
-			}, {
-				duration: 500
-			});
 			// Sans spawns Gaster Blasters
 			var spawnCount = Math.random() < 0.4 ? Math.floor(waveIntensity) : 1;
 			for (var s = 0; s < spawnCount && gasterBlasters.length < maxBlasters; s++) {
 				spawnGasterBlaster();
@@ -863,15 +872,10 @@
 		}
 		// Reset blue heart after 4 seconds
 		if (sans.attackTimer > 240) {
 			// 4 seconds at 60fps
-			heart.isBlue = false;
+			heart.setBlueMode(false);
 			sans.attackTimer = 0; // Reset timer to prevent staying blue
-			tween(heart, {
-				tint: 0x000000
-			}, {
-				duration: 500
-			});
 		}
 	}
 	// Ensure heart stays within bounds each frame
 	constrainHeartPosition();