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

/**** 
* Classes
****/ 
var Bomb = Container.expand(function () {
	var self = Container.call(this);
	// Create bomb visual
	var bombGraphics = self.attachAsset('bomb', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Random movement properties
	self.velocityX = (Math.random() - 0.5) * 12;
	self.velocityY = (Math.random() - 0.5) * 12;
	self.size = 40; // Half of width for collision detection
	// Track last position for collision detection
	self.lastX = 0;
	self.lastY = 0;
	self.lastIntersecting = [];
	self.update = function () {
		// Store last position
		self.lastX = self.x;
		self.lastY = self.y;
		// Move bomb
		self.x += self.velocityX * targetSpeedMultiplier;
		self.y += self.velocityY * targetSpeedMultiplier;
		// Bounce off edges
		if (self.x <= self.size || self.x >= 2048 - self.size) {
			self.velocityX *= -1;
			self.x = Math.max(self.size, Math.min(2048 - self.size, self.x));
		}
		if (self.y <= self.size || self.y >= 2732 - 200 - self.size) {
			self.velocityY *= -1;
			self.y = Math.max(self.size, Math.min(2732 - 200 - self.size, self.y));
		}
	};
	self.explode = function () {
		// Visual explosion effect - red flash for bomb
		LK.effects.flashObject(self, 0xFF0000, 300);
		tween(self, {
			scaleX: 2.0,
			scaleY: 2.0,
			alpha: 0
		}, {
			duration: 300,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
var DesertBackground = Container.expand(function () {
	var self = Container.call(this);
	// Create multiple layers of sand dunes
	var backDune = self.attachAsset('sandDune3', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 1024,
		y: 2732,
		alpha: 0.6
	});
	var midDune1 = self.attachAsset('sandDune1', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 400,
		y: 2732 - 100,
		alpha: 0.8
	});
	var midDune2 = self.attachAsset('sandDune2', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 1600,
		y: 2732 - 150,
		alpha: 0.7
	});
	// Add cacti scattered around
	var cactus1 = self.attachAsset('cactus', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 300,
		y: 2500
	});
	var cactusArm1 = self.attachAsset('cactusArm', {
		anchorX: 0,
		anchorY: 0.5,
		x: 320,
		y: 2400
	});
	var cactus2 = self.attachAsset('cactus', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 1700,
		y: 2400,
		scaleX: 0.8,
		scaleY: 0.8
	});
	var cactusArm2 = self.attachAsset('cactusArm', {
		anchorX: 1,
		anchorY: 0.5,
		x: 1680,
		y: 2320,
		scaleX: 0.8,
		scaleY: 0.8
	});
	// Add some rocks
	var rock1 = self.attachAsset('rock', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 800,
		y: 2600,
		alpha: 0.8
	});
	var rock2 = self.attachAsset('rock', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 1200,
		y: 2550,
		alpha: 0.7,
		scaleX: 0.6,
		scaleY: 0.6
	});
	var rock3 = self.attachAsset('rock', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 1500,
		y: 2650,
		alpha: 0.9,
		scaleX: 1.2,
		scaleY: 1.2
	});
	return self;
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.attachAsset('missile', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.speed = 30;
	self.setTarget = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.velocityX = dx / distance * self.speed;
			self.velocityY = dy / distance * self.speed;
		}
		// Rotate missile to face direction of travel
		self.rotation = Math.atan2(dy, dx) + Math.PI / 2;
	};
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
	};
	return self;
});
var RocketLauncher = Container.expand(function () {
	var self = Container.call(this);
	var launcherBase = self.attachAsset('launcher', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	var barrel = self.attachAsset('launcherBarrel', {
		anchorX: 0.5,
		anchorY: 1.0,
		y: -20
	});
	self.targetAngle = 0;
	self.currentAngle = 0;
	self.rotationSpeed = 0.15;
	self.aimAt = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		self.targetAngle = Math.atan2(dx, dy);
	};
	self.fire = function (targetX, targetY) {
		var missile = new Missile();
		missile.x = self.x;
		missile.y = self.y - 40;
		missile.setTarget(targetX, targetY);
		missiles.push(missile);
		game.addChild(missile);
		LK.getSound('launch').play();
		// Add some recoil effect
		tween(self, {
			scaleX: 1.2,
			scaleY: 0.9
		}, {
			duration: 100,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 150,
					easing: tween.easeOut
				});
			}
		});
	};
	self.update = function () {
		// Smoothly rotate launcher to target angle
		var angleDiff = self.targetAngle - self.currentAngle;
		// Handle angle wrapping
		if (angleDiff > Math.PI) {
			angleDiff -= 2 * Math.PI;
		} else if (angleDiff < -Math.PI) {
			angleDiff += 2 * Math.PI;
		}
		self.currentAngle += angleDiff * self.rotationSpeed;
		self.rotation = self.currentAngle;
	};
	return self;
});
var Target = Container.expand(function () {
	var self = Container.call(this);
	// Create target visual
	var targetGraphics = self.attachAsset('target', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Random movement properties
	self.velocityX = (Math.random() - 0.5) * 16;
	self.velocityY = (Math.random() - 0.5) * 16;
	self.size = 44; // Half of scaled width for collision detection
	// Track last position for collision detection
	self.lastX = 0;
	self.lastY = 0;
	self.lastIntersecting = [];
	self.update = function () {
		// Store last position
		self.lastX = self.x;
		self.lastY = self.y;
		// Move target
		self.x += self.velocityX * targetSpeedMultiplier;
		self.y += self.velocityY * targetSpeedMultiplier;
		// Bounce off edges
		if (self.x <= self.size || self.x >= 2048 - self.size) {
			self.velocityX *= -1;
			self.x = Math.max(self.size, Math.min(2048 - self.size, self.x));
		}
		if (self.y <= self.size || self.y >= 2732 - 200 - self.size) {
			self.velocityY *= -1;
			self.y = Math.max(self.size, Math.min(2732 - 200 - self.size, self.y));
		}
	};
	self.explode = function () {
		// Visual explosion effect
		LK.effects.flashObject(self, 0xFFFF00, 300);
		tween(self, {
			scaleX: 2.0,
			scaleY: 2.0,
			alpha: 0
		}, {
			duration: 300,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xF4A460
});

/**** 
* Game Code
****/ 
// Desert background elements
var missiles = [];
var targets = [];
var bombs = [];
var launcher = null;
var targetSpawnTimer = 0;
var bombSpawnTimer = 0;
var missileCount = 5;
var maxMissiles = 5;
var targetSpeedMultiplier = 1.0;
// Create and add desert background
var desertBackground = game.addChild(new DesertBackground());
// Initialize rocket launcher
launcher = game.addChild(new RocketLauncher());
launcher.x = 2048 / 2;
launcher.y = 2732 - 100;
// Level system variables
var currentLevel = 1;
var levelThresholds = [0, 50, 150, 300, 500, 750, 1000, 1500, 2000, 3000];
// Score display
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Level display
var levelTxt = new Text2('Level: 1', {
	size: 70,
	fill: 0x00FF00
});
levelTxt.anchor.set(1, 0);
levelTxt.y = 80;
LK.gui.topRight.addChild(levelTxt);
// Instructions
var instructionsTxt = new Text2('Tap anywhere to fire missiles!', {
	size: 48,
	fill: 0xCCCCCC
});
instructionsTxt.anchor.set(0.5, 0);
instructionsTxt.y = 100;
LK.gui.top.addChild(instructionsTxt);
// Missile count display
var missileCountTxt = new Text2('5/5', {
	size: 60,
	fill: 0xFFFFFF
});
missileCountTxt.anchor.set(1, 0);
missileCountTxt.y = 140;
LK.gui.topRight.addChild(missileCountTxt);
// Function to calculate current level based on score
function calculateLevel(score) {
	for (var i = levelThresholds.length - 1; i >= 0; i--) {
		if (score >= levelThresholds[i]) {
			return i + 1;
		}
	}
	return 1;
}
// Function to update level display
function updateLevel() {
	var newLevel = calculateLevel(LK.getScore());
	if (newLevel !== currentLevel) {
		currentLevel = newLevel;
		levelTxt.setText('Level: ' + currentLevel);
		// Level up effect
		LK.effects.flashScreen(0xFFD700, 500);
		// Scale animation for level text
		tween(levelTxt, {
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(levelTxt, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 200,
					easing: tween.easeOut
				});
			}
		});
	}
}
// Game tap handler
game.down = function (x, y, obj) {
	// Don't fire if tapping on launcher area
	if (y > 2732 - 200) {
		return;
	}
	// Aim and fire
	launcher.aimAt(x, y);
	// Check if enough time has passed since last shot (1 second)
	if (!game.lastShotTime) game.lastShotTime = 0;
	var currentTime = LK.ticks;
	var requiredTicks = LK.getScore() > 150 ? 12 : 30; // 12 ticks = 0.2 seconds, 30 ticks = 0.5 seconds
	if (currentTime - game.lastShotTime >= requiredTicks && missileCount > 0) {
		// 12 ticks = 0.2 seconds at 60fps when score > 150
		// 30 ticks = 0.5 seconds at 60fps and have missiles
		// 60 ticks = 1 second at 60fps and have missiles
		// Small delay before firing for visual feedback
		LK.setTimeout(function () {
			launcher.fire(x, y);
			// Update score - decrease by 1 for firing
			LK.setScore(LK.getScore() - 1);
			scoreTxt.setText('Score: ' + LK.getScore());
			updateLevel();
			// Decrease missile count
			missileCount--;
			missileCountTxt.setText(missileCount + '/' + maxMissiles);
		}, 200);
		game.lastShotTime = currentTime;
	}
};
game.update = function () {
	// Update target speed multiplier based on score
	if (LK.getScore() > 300) {
		targetSpeedMultiplier = 3.5;
	} else if (LK.getScore() > 150) {
		targetSpeedMultiplier = 2.5;
	} else if (LK.getScore() > 50) {
		targetSpeedMultiplier = 1.5;
	} else {
		targetSpeedMultiplier = 1.0;
	}
	// Spawn targets periodically
	targetSpawnTimer++;
	if (targetSpawnTimer >= 90) {
		// Spawn every 1.5 seconds, no limit
		var target = new Target();
		target.x = Math.random() * (2048 - 200) + 100;
		target.y = Math.random() * (2732 - 400) + 100;
		target.lastX = target.x;
		target.lastY = target.y;
		target.lastIntersecting = [];
		targets.push(target);
		game.addChild(target);
		targetSpawnTimer = 0;
	}
	// Spawn bombs periodically (less frequently than targets)
	bombSpawnTimer++;
	if (bombSpawnTimer >= 180) {
		// Spawn every 3 seconds
		var bomb = new Bomb();
		bomb.x = Math.random() * (2048 - 200) + 100;
		bomb.y = Math.random() * (2732 - 400) + 100;
		bomb.lastX = bomb.x;
		bomb.lastY = bomb.y;
		bomb.lastIntersecting = [];
		bombs.push(bomb);
		game.addChild(bomb);
		bombSpawnTimer = 0;
	}
	// Update missile speed based on score
	var missileSpeedMultiplier = LK.getScore() >= 300 ? 2.0 : 1.0;
	// Update missiles
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		// Apply speed multiplier to missile movement
		missile.velocityX *= missileSpeedMultiplier;
		missile.velocityY *= missileSpeedMultiplier;
		// Track last position for boundary checking
		if (missile.lastX === undefined) missile.lastX = missile.x;
		if (missile.lastY === undefined) missile.lastY = missile.y;
		if (missile.lastIntersecting === undefined) missile.lastIntersecting = [];
		// Check missile-bomb collisions first (game over condition)
		for (var j = bombs.length - 1; j >= 0; j--) {
			var bomb = bombs[j];
			var wasIntersecting = missile.lastIntersecting.indexOf('bomb_' + j) !== -1;
			var isIntersecting = missile.intersects(bomb);
			if (!wasIntersecting && isIntersecting) {
				// Missile hit bomb - game over!
				bomb.explode();
				bombs.splice(j, 1);
				// Flash screen red and show game over
				LK.effects.flashScreen(0xFF0000, 1000);
				LK.showGameOver();
				return;
			}
			if (isIntersecting) {
				if (missile.lastIntersecting.indexOf('bomb_' + j) === -1) {
					missile.lastIntersecting.push('bomb_' + j);
				}
			}
		}
		// Check missile-target collisions
		var hitTarget = false;
		for (var j = targets.length - 1; j >= 0; j--) {
			var target = targets[j];
			var wasIntersecting = missile.lastIntersecting.indexOf(j) !== -1;
			var isIntersecting = missile.intersects(target);
			if (!wasIntersecting && isIntersecting) {
				// Missile hit target
				target.explode();
				targets.splice(j, 1);
				// Update score
				LK.setScore(LK.getScore() + 6);
				scoreTxt.setText('Score: ' + LK.getScore());
				updateLevel();
				// Restore missile count to maximum
				missileCount = maxMissiles;
				missileCountTxt.setText(missileCount + '/' + maxMissiles);
				// Remove missile
				missile.destroy();
				missiles.splice(i, 1);
				hitTarget = true;
				break;
			}
			if (isIntersecting) {
				if (missile.lastIntersecting.indexOf(j) === -1) {
					missile.lastIntersecting.push(j);
				}
			}
		}
		if (hitTarget) continue;
		// Check if missile went off screen
		var offScreen = missile.x < -50 || missile.x > 2048 + 50 || missile.y < -50 || missile.y > 2732 + 50;
		if (offScreen) {
			missile.destroy();
			missiles.splice(i, 1);
			continue;
		}
		// Update last position
		missile.lastX = missile.x;
		missile.lastY = missile.y;
	}
	// Check game over condition - if more than 15 targets are alive
	if (targets.length > 15) {
		LK.showGameOver();
		return;
	}
	// Check game over condition - if missile count reaches 0
	if (missileCount <= 0) {
		LK.showGameOver();
		return;
	}
	// Update targets and handle target-target collisions
	for (var i = targets.length - 1; i >= 0; i--) {
		var target1 = targets[i];
		if (target1.lastIntersecting === undefined) target1.lastIntersecting = [];
		// Check collisions with other targets
		for (var j = i + 1; j < targets.length; j++) {
			var target2 = targets[j];
			var wasIntersecting = target1.lastIntersecting.indexOf(j) !== -1;
			var isIntersecting = target1.intersects(target2);
			if (!wasIntersecting && isIntersecting) {
				// Collision detected - bounce off each other
				var dx = target2.x - target1.x;
				var dy = target2.y - target1.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance > 0) {
					// Normalize collision vector
					dx /= distance;
					dy /= distance;
					// Separate targets
					var overlap = target1.size + target2.size - distance;
					target1.x -= dx * overlap * 0.5;
					target1.y -= dy * overlap * 0.5;
					target2.x += dx * overlap * 0.5;
					target2.y += dy * overlap * 0.5;
					// Exchange velocities (simplified collision response)
					var tempVelX = target1.velocityX;
					var tempVelY = target1.velocityY;
					target1.velocityX = target2.velocityX;
					target1.velocityY = target2.velocityY;
					target2.velocityX = tempVelX;
					target2.velocityY = tempVelY;
				}
			}
			// Update intersection tracking
			if (isIntersecting) {
				if (target1.lastIntersecting.indexOf(j) === -1) {
					target1.lastIntersecting.push(j);
				}
			} else {
				var index = target1.lastIntersecting.indexOf(j);
				if (index !== -1) {
					target1.lastIntersecting.splice(index, 1);
				}
			}
		}
	}
	// Update bombs and handle bomb-bomb collisions
	for (var i = bombs.length - 1; i >= 0; i--) {
		var bomb1 = bombs[i];
		if (bomb1.lastIntersecting === undefined) bomb1.lastIntersecting = [];
		// Check collisions with other bombs
		for (var j = i + 1; j < bombs.length; j++) {
			var bomb2 = bombs[j];
			var wasIntersecting = bomb1.lastIntersecting.indexOf(j) !== -1;
			var isIntersecting = bomb1.intersects(bomb2);
			if (!wasIntersecting && isIntersecting) {
				// Collision detected - bounce off each other
				var dx = bomb2.x - bomb1.x;
				var dy = bomb2.y - bomb1.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance > 0) {
					// Normalize collision vector
					dx /= distance;
					dy /= distance;
					// Separate bombs
					var overlap = bomb1.size + bomb2.size - distance;
					bomb1.x -= dx * overlap * 0.5;
					bomb1.y -= dy * overlap * 0.5;
					bomb2.x += dx * overlap * 0.5;
					bomb2.y += dy * overlap * 0.5;
					// Exchange velocities (simplified collision response)
					var tempVelX = bomb1.velocityX;
					var tempVelY = bomb1.velocityY;
					bomb1.velocityX = bomb2.velocityX;
					bomb1.velocityY = bomb2.velocityY;
					bomb2.velocityX = tempVelX;
					bomb2.velocityY = tempVelY;
				}
			}
			// Update intersection tracking
			if (isIntersecting) {
				if (bomb1.lastIntersecting.indexOf(j) === -1) {
					bomb1.lastIntersecting.push(j);
				}
			} else {
				var index = bomb1.lastIntersecting.indexOf(j);
				if (index !== -1) {
					bomb1.lastIntersecting.splice(index, 1);
				}
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -5,8 +5,57 @@
 
 /**** 
 * Classes
 ****/ 
+var Bomb = Container.expand(function () {
+	var self = Container.call(this);
+	// Create bomb visual
+	var bombGraphics = self.attachAsset('bomb', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Random movement properties
+	self.velocityX = (Math.random() - 0.5) * 12;
+	self.velocityY = (Math.random() - 0.5) * 12;
+	self.size = 40; // Half of width for collision detection
+	// Track last position for collision detection
+	self.lastX = 0;
+	self.lastY = 0;
+	self.lastIntersecting = [];
+	self.update = function () {
+		// Store last position
+		self.lastX = self.x;
+		self.lastY = self.y;
+		// Move bomb
+		self.x += self.velocityX * targetSpeedMultiplier;
+		self.y += self.velocityY * targetSpeedMultiplier;
+		// Bounce off edges
+		if (self.x <= self.size || self.x >= 2048 - self.size) {
+			self.velocityX *= -1;
+			self.x = Math.max(self.size, Math.min(2048 - self.size, self.x));
+		}
+		if (self.y <= self.size || self.y >= 2732 - 200 - self.size) {
+			self.velocityY *= -1;
+			self.y = Math.max(self.size, Math.min(2732 - 200 - self.size, self.y));
+		}
+	};
+	self.explode = function () {
+		// Visual explosion effect - red flash for bomb
+		LK.effects.flashObject(self, 0xFF0000, 300);
+		tween(self, {
+			scaleX: 2.0,
+			scaleY: 2.0,
+			alpha: 0
+		}, {
+			duration: 300,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				self.destroy();
+			}
+		});
+	};
+	return self;
+});
 var DesertBackground = Container.expand(function () {
 	var self = Container.call(this);
 	// Create multiple layers of sand dunes
 	var backDune = self.attachAsset('sandDune3', {
@@ -234,10 +283,12 @@
 ****/ 
 // Desert background elements
 var missiles = [];
 var targets = [];
+var bombs = [];
 var launcher = null;
 var targetSpawnTimer = 0;
+var bombSpawnTimer = 0;
 var missileCount = 5;
 var maxMissiles = 5;
 var targetSpeedMultiplier = 1.0;
 // Create and add desert background
@@ -370,8 +421,22 @@
 		targets.push(target);
 		game.addChild(target);
 		targetSpawnTimer = 0;
 	}
+	// Spawn bombs periodically (less frequently than targets)
+	bombSpawnTimer++;
+	if (bombSpawnTimer >= 180) {
+		// Spawn every 3 seconds
+		var bomb = new Bomb();
+		bomb.x = Math.random() * (2048 - 200) + 100;
+		bomb.y = Math.random() * (2732 - 400) + 100;
+		bomb.lastX = bomb.x;
+		bomb.lastY = bomb.y;
+		bomb.lastIntersecting = [];
+		bombs.push(bomb);
+		game.addChild(bomb);
+		bombSpawnTimer = 0;
+	}
 	// Update missile speed based on score
 	var missileSpeedMultiplier = LK.getScore() >= 300 ? 2.0 : 1.0;
 	// Update missiles
 	for (var i = missiles.length - 1; i >= 0; i--) {
@@ -382,8 +447,28 @@
 		// Track last position for boundary checking
 		if (missile.lastX === undefined) missile.lastX = missile.x;
 		if (missile.lastY === undefined) missile.lastY = missile.y;
 		if (missile.lastIntersecting === undefined) missile.lastIntersecting = [];
+		// Check missile-bomb collisions first (game over condition)
+		for (var j = bombs.length - 1; j >= 0; j--) {
+			var bomb = bombs[j];
+			var wasIntersecting = missile.lastIntersecting.indexOf('bomb_' + j) !== -1;
+			var isIntersecting = missile.intersects(bomb);
+			if (!wasIntersecting && isIntersecting) {
+				// Missile hit bomb - game over!
+				bomb.explode();
+				bombs.splice(j, 1);
+				// Flash screen red and show game over
+				LK.effects.flashScreen(0xFF0000, 1000);
+				LK.showGameOver();
+				return;
+			}
+			if (isIntersecting) {
+				if (missile.lastIntersecting.indexOf('bomb_' + j) === -1) {
+					missile.lastIntersecting.push('bomb_' + j);
+				}
+			}
+		}
 		// Check missile-target collisions
 		var hitTarget = false;
 		for (var j = targets.length - 1; j >= 0; j--) {
 			var target = targets[j];
@@ -479,5 +564,51 @@
 				}
 			}
 		}
 	}
+	// Update bombs and handle bomb-bomb collisions
+	for (var i = bombs.length - 1; i >= 0; i--) {
+		var bomb1 = bombs[i];
+		if (bomb1.lastIntersecting === undefined) bomb1.lastIntersecting = [];
+		// Check collisions with other bombs
+		for (var j = i + 1; j < bombs.length; j++) {
+			var bomb2 = bombs[j];
+			var wasIntersecting = bomb1.lastIntersecting.indexOf(j) !== -1;
+			var isIntersecting = bomb1.intersects(bomb2);
+			if (!wasIntersecting && isIntersecting) {
+				// Collision detected - bounce off each other
+				var dx = bomb2.x - bomb1.x;
+				var dy = bomb2.y - bomb1.y;
+				var distance = Math.sqrt(dx * dx + dy * dy);
+				if (distance > 0) {
+					// Normalize collision vector
+					dx /= distance;
+					dy /= distance;
+					// Separate bombs
+					var overlap = bomb1.size + bomb2.size - distance;
+					bomb1.x -= dx * overlap * 0.5;
+					bomb1.y -= dy * overlap * 0.5;
+					bomb2.x += dx * overlap * 0.5;
+					bomb2.y += dy * overlap * 0.5;
+					// Exchange velocities (simplified collision response)
+					var tempVelX = bomb1.velocityX;
+					var tempVelY = bomb1.velocityY;
+					bomb1.velocityX = bomb2.velocityX;
+					bomb1.velocityY = bomb2.velocityY;
+					bomb2.velocityX = tempVelX;
+					bomb2.velocityY = tempVelY;
+				}
+			}
+			// Update intersection tracking
+			if (isIntersecting) {
+				if (bomb1.lastIntersecting.indexOf(j) === -1) {
+					bomb1.lastIntersecting.push(j);
+				}
+			} else {
+				var index = bomb1.lastIntersecting.indexOf(j);
+				if (index !== -1) {
+					bomb1.lastIntersecting.splice(index, 1);
+				}
+			}
+		}
+	}
 };
\ No newline at end of file