/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Dart class
var Dart = Container.expand(function () {
	var self = Container.call(this);
	var dartGraphics = self.attachAsset('dart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = 0;
	self.speedY = 0;
	self.gravity = 0.5;
	self.update = function () {
		self.speedY += self.gravity;
		self.x += self.speedX;
		self.y += self.speedY;
	};
});
// Target class
var Target = Container.expand(function () {
	var self = Container.call(this);
	var targetGraphics = self.attachAsset('target', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background 
});

/**** 
* Game Code
****/ 
// Initialize score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize target
var target = game.addChild(new Target());
target.x = 2048 / 2;
target.y = 2732 / 4;
// Initialize darts array
var darts = [];
// Mouse or touch down on the game
game.down = function (x, y, obj) {
	var newDart = new Dart();
	newDart.x = x;
	newDart.y = y;
	newDart.startX = x;
	newDart.startY = y;
	newDart.lastX = x;
	newDart.lastY = y;
	darts.push(newDart);
	game.addChild(newDart);
	game.currentDart = newDart;
};
// Mouse or touch move on the game
game.move = function (x, y, obj) {
	if (game.currentDart) {
		var dx = x - game.currentDart.startX;
		var dy = y - game.currentDart.startY;
		var distance = Math.sqrt(dx * dx + dy * dy);
		var time = 1; // Assuming 1 frame for simplicity, adjust as needed
		var speed = distance / time;
		var angle = Math.atan2(dy, dx);
		game.currentDart.speedX = Math.cos(angle) * speed;
		game.currentDart.speedY = Math.sin(angle) * speed;
		game.currentDart.startX = x;
		game.currentDart.startY = y;
	}
};
// Mouse or touch up on the game
game.up = function (x, y, obj) {
	if (game.currentDart) {
		var dx = x - game.currentDart.lastX;
		var dy = y - game.currentDart.lastY;
		var distance = Math.sqrt(dx * dx + dy * dy);
		var time = 1; // Assuming 1 frame for simplicity, adjust as needed
		var speed = distance / time;
		var angle = Math.atan2(dy, dx);
		game.currentDart.speedX = Math.cos(angle) * speed;
		game.currentDart.speedY = Math.sin(angle) * speed;
		game.currentDart = null;
	}
};
// Update game every tick
game.update = function () {
	for (var i = darts.length - 1; i >= 0; i--) {
		if (darts[i].intersects(target)) {
			// Update score
			score += 1;
			scoreTxt.setText(score);
			darts[i].destroy();
			darts.splice(i, 1);
		} else if (darts[i].x > 2048 || darts[i].y > 2732) {
			darts[i].destroy();
			darts.splice(i, 1);
		} else {
			darts[i].update();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -57,8 +57,10 @@
 	newDart.x = x;
 	newDart.y = y;
 	newDart.startX = x;
 	newDart.startY = y;
+	newDart.lastX = x;
+	newDart.lastY = y;
 	darts.push(newDart);
 	game.addChild(newDart);
 	game.currentDart = newDart;
 };
@@ -66,16 +68,31 @@
 game.move = function (x, y, obj) {
 	if (game.currentDart) {
 		var dx = x - game.currentDart.startX;
 		var dy = y - game.currentDart.startY;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		var time = 1; // Assuming 1 frame for simplicity, adjust as needed
+		var speed = distance / time;
 		var angle = Math.atan2(dy, dx);
-		game.currentDart.speedX = Math.cos(angle) * 10;
-		game.currentDart.speedY = Math.sin(angle) * 10;
+		game.currentDart.speedX = Math.cos(angle) * speed;
+		game.currentDart.speedY = Math.sin(angle) * speed;
+		game.currentDart.startX = x;
+		game.currentDart.startY = y;
 	}
 };
 // Mouse or touch up on the game
 game.up = function (x, y, obj) {
-	game.currentDart = null;
+	if (game.currentDart) {
+		var dx = x - game.currentDart.lastX;
+		var dy = y - game.currentDart.lastY;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		var time = 1; // Assuming 1 frame for simplicity, adjust as needed
+		var speed = distance / time;
+		var angle = Math.atan2(dy, dx);
+		game.currentDart.speedX = Math.cos(angle) * speed;
+		game.currentDart.speedY = Math.sin(angle) * speed;
+		game.currentDart = null;
+	}
 };
 // Update game every tick
 game.update = function () {
 	for (var i = darts.length - 1; i >= 0; i--) {
@@ -87,7 +104,9 @@
 			darts.splice(i, 1);
 		} else if (darts[i].x > 2048 || darts[i].y > 2732) {
 			darts[i].destroy();
 			darts.splice(i, 1);
+		} else {
+			darts[i].update();
 		}
 	}
 };
\ No newline at end of file