/**** 
* Classes
****/ 
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.75
	});
	self.noAccelerationUpdates = 0;
	self.forceX = self.forceY = 0;
	self.acceleration = 0;
	self.prevRotation = 0;
});
var Dust = Container.expand(function () {
	var self = Container.call(this);
	var dustGraphics = self.attachAsset('dirt', {
		anchorX: 0.5,
		anchorY: 0.75
	});
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.y -= self.speed;
	};
});
var Skidmark = Container.expand(function () {
	var self = Container.call(this);
	var skidmarkGraphics = self.attachAsset('skidmark', {
		anchorX: 0.5,
		anchorY: 0.8
	});
	self.alpha = 1;
	self.rotation = 0;
	self.width = 90;
	self.height = 90;
	self.update = function () {
		self.alpha -= 0.001;
		if (self.alpha <= 0) {
			self.destroy();
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2e2e2e
});

/**** 
* Game Code
****/ 
game.down = function (x, y, obj) {
	game.isDown = true;
	var midScreenX = 2048 / 2;
	var distanceFromMid = x - midScreenX;
	if (distanceFromMid < 0) {
		car.rotation -= 0.1; // Rotate left
	} else {
		car.rotation += 0.1; // Rotate right
	}
};
game.up = function (x, y) {
	game.isDown = false;
};
var obstacles = [];
game.update = function () {
	if (game.isDown) {
		car.acceleration += 0.2;
		var distX = 30;
		var dAcc = Math.abs(car.rotation - car.prevRotation);
		var skidmark = gameLayer.addChildAt(new Skidmark(), 0);
		skidmark.rotation = car.rotation;
		skidmark.x = car.x;
		skidmark.y = car.y;
		var alpha = Math.min(10 * dAcc, 1);
		if (dAcc == 0) {
			alpha = 0.1;
		}
		skidmark.alpha = alpha;
	}
	if (game.isDown) {
		car.forceX += Math.sin(car.rotation) * 0.5;
		car.forceY += Math.cos(car.rotation) * 0.5;
	} else {
		car.noAccelerationUpdates += 1;
		var t = Math.min(car.noAccelerationUpdates, 20) / 10;
		t = Math.min(0.1, t);
		if (t < 0.01) {
			t = 0;
		}
		console.log(t, car.noAccelerationUpdates);
		car.forceX += Math.sin(car.rotation) * (0.1 * t);
		car.forceY += Math.cos(car.rotation) * (0.1 * t);
	}
	car.x += car.forceX;
	car.y -= car.forceY;
	car.prevRotation = car.rotation;
	car.forceX *= 0.97; // Apply friction to slow down the car
	car.forceY *= 0.97;
	if (car.x < 0) {
		car.x = 0;
	}
	if (car.x > 2048) {
		car.x = 2048;
	}
	if (car.y < 0) {
		car.y = 0;
	}
	if (car.y > 2732) {
		car.y = 2732;
	}
};
var backgroundLayer = new Container();
game.addChildAt(backgroundLayer, 0);
var background = backgroundLayer.addChild(LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5
}));
background.x = 2048 / 2;
background.y = 2732 / 2;
var gameLayer = new Container();
game.addChild(gameLayer);
var car = gameLayer.addChild(new Car());
car.x = 2048 / 2;
car.y = 2732 / 2 + 500;
car.prevRotation = car.rotation;
for (var i = 0; i < 2048; i += 100) {
	for (var j = 0; j < 2732; j += 100) {
		if (Math.random() < 0.1) {
			var dust = gameLayer.addChild(new Dust());
			dust.x = i;
			dust.y = j;
		}
	}
}
var oldX, oldY;
game.move = function (x, y, obj) {
	if (!oldX) {
		oldX = x;
	}
	if (!oldY) {
		oldY = y;
	}
	if (game.isDown) {
		var dx = x - oldX;
		if (dx < 0) {
			dx = Math.max(dx, -4);
		}
		if (dx > 0) {
			dx = Math.min(dx, 4);
		}
		car.rotation += dx / 100; // Rotate left
		oldX = x;
		oldY = y;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -6,8 +6,9 @@
 	var carGraphics = self.attachAsset('car', {
 		anchorX: 0.5,
 		anchorY: 0.75
 	});
+	self.noAccelerationUpdates = 0;
 	self.forceX = self.forceY = 0;
 	self.acceleration = 0;
 	self.prevRotation = 0;
 });
@@ -85,15 +86,21 @@
 			alpha = 0.1;
 		}
 		skidmark.alpha = alpha;
 	}
-	car.forceX += Math.sin(car.rotation) * 0.5;
-	car.forceY += Math.cos(car.rotation) * 0.5;
-	car.forceX *= 0.97; // Apply friction to slow down the car
-	car.forceY *= 0.97;
 	if (game.isDown) {
 		car.forceX += Math.sin(car.rotation) * 0.5;
 		car.forceY += Math.cos(car.rotation) * 0.5;
+	} else {
+		car.noAccelerationUpdates += 1;
+		var t = Math.min(car.noAccelerationUpdates, 20) / 10;
+		t = Math.min(0.1, t);
+		if (t < 0.01) {
+			t = 0;
+		}
+		console.log(t, car.noAccelerationUpdates);
+		car.forceX += Math.sin(car.rotation) * (0.1 * t);
+		car.forceY += Math.cos(car.rotation) * (0.1 * t);
 	}
 	car.x += car.forceX;
 	car.y -= car.forceY;
 	car.prevRotation = car.rotation;