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

/**** 
* Classes
****/ 
var CutPiece = Container.expand(function () {
	var self = Container.call(this);
	var piece = self.attachAsset('cutPiece', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.animate = function (direction, blockWidth) {
		// Set initial appearance
		piece.alpha = 1;
		piece.width = blockWidth;
		// Animate piece falling and rotating
		var fallDirection = direction === 'left' ? -1 : 1;
		tween(self, {
			x: self.x + fallDirection * 400,
			y: self.y + 600,
			rotation: fallDirection * Math.PI * 2
		}, {
			duration: 1200,
			easing: tween.easeIn
		});
		tween(piece, {
			alpha: 0
		}, {
			duration: 1200,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
var StackedBlock = Container.expand(function () {
	var self = Container.call(this);
	var block = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb
});

/**** 
* Game Code
****/ 
// Game state
var stackedBlocks = [];
var gameHeight = 2732;
var gameWidth = 2048;
var groundLevel = gameHeight - 120;
var stackHeight = 0;
var gameActive = true;
// Create foundation block
var foundation = new StackedBlock();
foundation.x = gameWidth / 2;
foundation.y = gameHeight - 120; // Move to bottom of screen
game.addChild(foundation);
stackedBlocks.push(foundation);
stackHeight = foundation.y;
// Create rope hanging from top center
var rope = LK.getAsset('rope', {
	anchorX: 0.5,
	anchorY: 0
});
rope.x = gameWidth / 2;
rope.y = 0; // Rope starts at top of screen
game.addChild(rope);
// Create swinging block at the end of rope
var swingingBlock = LK.getAsset('swingingBlock', {
	anchorX: 0.5,
	anchorY: 0.5
});
swingingBlock.x = 0;
swingingBlock.y = rope.height + 100; // Extend the rope length by moving block further down
rope.addChild(swingingBlock);
// Natural pendulum swing variables
var swingTime = 0;
var swingSpeed = 0.03; // Controls swing speed
var swingAmplitude = 1.2; // Controls swing range (max rotation) - increased for wider swing
// Score display
var scoreTxt = new Text2('Blocks: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Touch handler to drop the block
game.down = function (x, y, obj) {
	if (!gameActive || !swingingBlock.parent || swingingBlock.falling) return;
	// Get the current world position of the swinging block
	var worldPos = rope.toGlobal(swingingBlock.position);
	var gamePos = game.toLocal(worldPos);
	// Detach from rope and add to game
	rope.removeChild(swingingBlock);
	game.addChild(swingingBlock);
	// Set position in game coordinates
	swingingBlock.x = gamePos.x;
	swingingBlock.y = gamePos.y;
	// Add falling velocity
	swingingBlock.velocityY = 25; // Start with constant speed
	swingingBlock.falling = true;
};
// Update function for falling blocks
game.update = function () {
	// Update rope swing with natural pendulum motion
	if (rope && !swingingBlock.falling) {
		// Gradually increase swing speed based on score - every 5 blocks
		var currentSwingSpeed = swingSpeed + Math.floor(LK.getScore() / 5) * 0.005; // Increase speed by 0.005 every 5 blocks
		swingTime += currentSwingSpeed;
		rope.rotation = Math.sin(swingTime) * swingAmplitude;
		// Add vertical swinging motion to the swinging block
		var verticalOffset = Math.cos(swingTime * 2) * 30; // Vertical swing with smaller amplitude
		swingingBlock.y = rope.height + 100 + verticalOffset;
	}
	if (swingingBlock.falling) {
		// Use constant falling speed instead of accelerating gravity
		swingingBlock.velocityY = 25; // Fixed falling speed
		swingingBlock.y += swingingBlock.velocityY;
		// Check collision with any stacked block using built-in intersects method
		var hasCollision = false;
		for (var i = 0; i < stackedBlocks.length; i++) {
			var block = stackedBlocks[i];
			if (swingingBlock.intersects(block)) {
				hasCollision = true;
				break;
			}
		}
		if (hasCollision) {
			// Find the topmost block that the swinging block collided with
			var targetBlock = null;
			var highestY = gameHeight;
			for (var k = 0; k < stackedBlocks.length; k++) {
				if (swingingBlock.intersects(stackedBlocks[k]) && stackedBlocks[k].y < highestY) {
					targetBlock = stackedBlocks[k];
					highestY = stackedBlocks[k].y;
				}
			}
			if (targetBlock) {
				// Add collision animation effects
				// Screen shake effect
				tween(game, {
					x: 10
				}, {
					duration: 50,
					easing: tween.linear
				});
				tween(game, {
					x: -10
				}, {
					duration: 50,
					easing: tween.linear,
					onFinish: function onFinish() {
						tween(game, {
							x: 5
						}, {
							duration: 50,
							easing: tween.linear
						});
						tween(game, {
							x: -5
						}, {
							duration: 50,
							easing: tween.linear,
							onFinish: function onFinish() {
								tween(game, {
									x: 0
								}, {
									duration: 50,
									easing: tween.linear
								});
							}
						});
					}
				});
				// Flash both blocks white for collision effect
				var originalSwingingTint = swingingBlock.tint || 0xFFFFFF;
				var originalTargetTint = targetBlock.tint || 0xFFFFFF;
				swingingBlock.tint = 0xFFFFFF;
				targetBlock.tint = 0xFFFFFF;
				tween(swingingBlock, {
					tint: originalSwingingTint
				}, {
					duration: 200,
					easing: tween.linear
				});
				tween(targetBlock, {
					tint: originalTargetTint
				}, {
					duration: 200,
					easing: tween.linear
				});
				// Check if block is close enough to the top of the target block to land
				var blockBottom = swingingBlock.y + swingingBlock.height / 2;
				var targetTop = targetBlock.y - targetBlock.height / 2;
				var landingDistance = Math.abs(blockBottom - targetTop);
				// Only land if we're within reasonable landing distance (less than falling speed)
				if (landingDistance <= 30) {
					// Award 1 point
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText('Blocks: ' + LK.getScore());
					// Calculate collision overlap and trim the block
					var targetLeft = targetBlock.x - targetBlock.width / 2;
					var targetRight = targetBlock.x + targetBlock.width / 2;
					var swingingLeft = swingingBlock.x - swingingBlock.width / 2;
					var swingingRight = swingingBlock.x + swingingBlock.width / 2;
					// Find the overlapping area
					var overlapLeft = Math.max(targetLeft, swingingLeft);
					var overlapRight = Math.min(targetRight, swingingRight);
					var overlapWidth = overlapRight - overlapLeft;
					// Only proceed if there's actual overlap
					if (overlapWidth > 0) {
						// Place block exactly on top of target block
						swingingBlock.falling = false;
						swingingBlock.velocityY = 0;
						swingingBlock.y = targetBlock.y - 256; // Place exactly one block height above
						// Create cut pieces for trimmed parts
						var leftTrimmed = swingingLeft < overlapLeft;
						var rightTrimmed = swingingRight > overlapRight;
						if (leftTrimmed) {
							// Create cut piece for left trimmed part
							var leftCutPiece = new CutPiece();
							game.addChild(leftCutPiece);
							var leftTrimWidth = overlapLeft - swingingLeft;
							leftCutPiece.x = swingingLeft + leftTrimWidth / 2;
							leftCutPiece.y = swingingBlock.y;
							leftCutPiece.animate('left', leftTrimWidth);
						}
						if (rightTrimmed) {
							// Create cut piece for right trimmed part
							var rightCutPiece = new CutPiece();
							game.addChild(rightCutPiece);
							var rightTrimWidth = swingingRight - overlapRight;
							rightCutPiece.x = overlapRight + rightTrimWidth / 2;
							rightCutPiece.y = swingingBlock.y;
							rightCutPiece.animate('right', rightTrimWidth);
						}
						// Calculate how much of the original block remains
						var originalWidth = 280; // Original block width
						var remainingPercentage = overlapWidth / originalWidth * 100;
						// Check if 95% or more was trimmed (only 5% or less remains)
						if (remainingPercentage <= 5) {
							// Game over - too much of the block was cut off
							gameActive = false;
							LK.showGameOver();
							return;
						}
						// Trim the block to only show the overlapping area
						var newCenterX = overlapLeft + overlapWidth / 2;
						swingingBlock.x = newCenterX;
						swingingBlock.width = overlapWidth;
						stackedBlocks.push(swingingBlock);
					} else {
						// No overlap, block falls off
						swingingBlock.falling = true;
					}
					// Update stack height to the new top
					stackHeight = swingingBlock.y;
					// After 2 blocks are placed (3rd block landing), start sliding all blocks down
					if (LK.getScore() > 2) {
						// Animate all blocks sliding down by one block height (256px)
						for (var b = 0; b < stackedBlocks.length; b++) {
							var block = stackedBlocks[b];
							tween(block, {
								y: block.y + 256
							}, {
								duration: 800,
								easing: tween.easeInOut
							});
						}
						// Get the bottom block for destruction after animation
						var bottomBlock = stackedBlocks[0];
						// Set a timeout to destroy the bottom block after animation completes
						LK.setTimeout(function () {
							bottomBlock.destroy();
							stackedBlocks.splice(0, 1);
						}, 800);
					}
					// Create new swinging block
					swingingBlock = LK.getAsset('swingingBlock', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					swingingBlock.x = 0;
					swingingBlock.y = rope.height + 100;
					rope.addChild(swingingBlock);
				} else {
					// Not close enough to land - continue falling
					swingingBlock.falling = true;
				}
			}
		}
		// Check if block has fallen below the screen
		else if (swingingBlock.y > gameHeight + 200) {
			// Game over - player missed the target
			gameActive = false;
			LK.showGameOver();
		}
	}
};
;

===================================================================
--- original.js
+++ change.js
@@ -115,49 +115,17 @@
 	swingingBlock.falling = true;
 };
 // Update function for falling blocks
 game.update = function () {
-	// Update rope swing with smooth tween-based pendulum motion
+	// Update rope swing with natural pendulum motion
 	if (rope && !swingingBlock.falling) {
-		// Check if we need to start a new swing cycle
-		if (!rope.swingDirection) {
-			rope.swingDirection = 1; // 1 for right, -1 for left
-			rope.isSwinging = false;
-		}
-		// Start new swing tween if not currently swinging
-		if (!rope.isSwinging) {
-			rope.isSwinging = true;
-			var targetRotation = rope.swingDirection * swingAmplitude;
-			// Calculate swing duration based on score - every 5 blocks
-			var speedMultiplier = 1 + Math.floor(LK.getScore() / 5) * 0.3; // Increase speed by 30% every 5 blocks
-			var swingDuration = 1200 / speedMultiplier; // Base duration of 1200ms
-			// Smooth swing to target position
-			tween(rope, {
-				rotation: targetRotation
-			}, {
-				duration: swingDuration,
-				easing: tween.easeInOut,
-				onFinish: function onFinish() {
-					rope.swingDirection *= -1; // Reverse direction
-					rope.isSwinging = false; // Allow next swing
-				}
-			});
-			// Add subtle vertical bobbing motion to swinging block
-			tween(swingingBlock, {
-				y: rope.height + 120
-			}, {
-				duration: swingDuration / 2,
-				easing: tween.easeInOut,
-				onFinish: function onFinish() {
-					tween(swingingBlock, {
-						y: rope.height + 100
-					}, {
-						duration: swingDuration / 2,
-						easing: tween.easeInOut
-					});
-				}
-			});
-		}
+		// Gradually increase swing speed based on score - every 5 blocks
+		var currentSwingSpeed = swingSpeed + Math.floor(LK.getScore() / 5) * 0.005; // Increase speed by 0.005 every 5 blocks
+		swingTime += currentSwingSpeed;
+		rope.rotation = Math.sin(swingTime) * swingAmplitude;
+		// Add vertical swinging motion to the swinging block
+		var verticalOffset = Math.cos(swingTime * 2) * 30; // Vertical swing with smaller amplitude
+		swingingBlock.y = rope.height + 100 + verticalOffset;
 	}
 	if (swingingBlock.falling) {
 		// Use constant falling speed instead of accelerating gravity
 		swingingBlock.velocityY = 25; // Fixed falling speed
@@ -181,8 +149,61 @@
 					highestY = stackedBlocks[k].y;
 				}
 			}
 			if (targetBlock) {
+				// Add collision animation effects
+				// Screen shake effect
+				tween(game, {
+					x: 10
+				}, {
+					duration: 50,
+					easing: tween.linear
+				});
+				tween(game, {
+					x: -10
+				}, {
+					duration: 50,
+					easing: tween.linear,
+					onFinish: function onFinish() {
+						tween(game, {
+							x: 5
+						}, {
+							duration: 50,
+							easing: tween.linear
+						});
+						tween(game, {
+							x: -5
+						}, {
+							duration: 50,
+							easing: tween.linear,
+							onFinish: function onFinish() {
+								tween(game, {
+									x: 0
+								}, {
+									duration: 50,
+									easing: tween.linear
+								});
+							}
+						});
+					}
+				});
+				// Flash both blocks white for collision effect
+				var originalSwingingTint = swingingBlock.tint || 0xFFFFFF;
+				var originalTargetTint = targetBlock.tint || 0xFFFFFF;
+				swingingBlock.tint = 0xFFFFFF;
+				targetBlock.tint = 0xFFFFFF;
+				tween(swingingBlock, {
+					tint: originalSwingingTint
+				}, {
+					duration: 200,
+					easing: tween.linear
+				});
+				tween(targetBlock, {
+					tint: originalTargetTint
+				}, {
+					duration: 200,
+					easing: tween.linear
+				});
 				// Check if block is close enough to the top of the target block to land
 				var blockBottom = swingingBlock.y + swingingBlock.height / 2;
 				var targetTop = targetBlock.y - targetBlock.height / 2;
 				var landingDistance = Math.abs(blockBottom - targetTop);