===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,165 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// The main block the player controls
+var JumpBlock = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach the block asset (a box)
+	var block = self.attachAsset('jumpBlock', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Block state
+	self.isJumping = false;
+	self.jumpHeight = 500; // How high the block jumps (in px)
+	self.jumpDuration = 350; // ms for jump up
+	self.fallDuration = 400; // ms for fall down
+	// Store ground Y for reset
+	self.groundY = 0;
+	// Method to trigger jump
+	self.jump = function (_onFinish) {
+		if (self.isJumping) return;
+		self.isJumping = true;
+		// Animate up
+		tween(self, {
+			y: self.y - self.jumpHeight
+		}, {
+			duration: self.jumpDuration,
+			easing: tween.cubicOut,
+			onFinish: function onFinish() {
+				// Animate down
+				tween(self, {
+					y: self.groundY
+				}, {
+					duration: self.fallDuration,
+					easing: tween.bounceOut,
+					onFinish: function onFinish() {
+						self.isJumping = false;
+						if (_onFinish) _onFinish();
+					}
+				});
+			}
+		});
+	};
+	return self;
+});
+// The jump arrow button
+var JumpButton = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach a large ellipse as the button
+	var btn = self.attachAsset('jumpArrowBtn', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Attach an up arrow (box rotated)
+	var arrow = self.attachAsset('jumpArrow', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	arrow.width = btn.width * 0.4;
+	arrow.height = btn.height * 0.18;
+	arrow.rotation = -Math.PI / 2;
+	arrow.y = 0;
+	// Visual feedback on press
+	self.flash = function () {
+		tween(btn, {
+			scaleX: 0.92,
+			scaleY: 0.92
+		}, {
+			duration: 60,
+			easing: tween.easeIn,
+			onFinish: function onFinish() {
+				tween(btn, {
+					scaleX: 1,
+					scaleY: 1
+				}, {
+					duration: 80,
+					easing: tween.easeOut
+				});
+			}
+		});
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x222a36
+});
+
+/**** 
+* Game Code
+****/ 
+// Score text
+// Create block asset (box)
+// Create jump button asset (ellipse)
+// Create arrow asset (box, will be rotated)
+var scoreTxt = new Text2('0', {
+	size: 140,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Center block horizontally, place at bottom with margin
+var block = new JumpBlock();
+game.addChild(block);
+block.x = 2048 / 2;
+block.groundY = 2732 - 220;
+block.y = block.groundY;
+// Place jump button above bottom, centered
+var jumpBtn = new JumpButton();
+game.addChild(jumpBtn);
+jumpBtn.x = 2048 / 2;
+jumpBtn.y = 2732 - 420;
+// Score
+var score = 0;
+// Touch/click handling for jump button
+var isBtnPressed = false;
+// Helper: check if point (x, y) is inside jumpBtn
+function isInsideJumpBtn(x, y) {
+	// Use ellipse hit test
+	var dx = x - jumpBtn.x;
+	var dy = y - jumpBtn.y;
+	var rx = jumpBtn.width / 2;
+	var ry = jumpBtn.height / 2;
+	return dx * dx / (rx * rx) + dy * dy / (ry * ry) <= 1;
+}
+// Main move handler
+function handleMove(x, y, obj) {
+	// No drag needed, just visual feedback if finger is on button
+	if (isBtnPressed) {
+		if (!isInsideJumpBtn(x, y)) {
+			isBtnPressed = false;
+		}
+	}
+}
+// Down event: check if jumpBtn is pressed
+game.down = function (x, y, obj) {
+	if (isInsideJumpBtn(x, y) && !block.isJumping) {
+		isBtnPressed = true;
+		jumpBtn.flash();
+		block.jump(function () {
+			// On landing, increment score
+			score += 1;
+			LK.setScore(score);
+			scoreTxt.setText(score);
+		});
+	}
+};
+// Up event: reset press state
+game.up = function (x, y, obj) {
+	isBtnPressed = false;
+};
+// Move event: for touch feedback
+game.move = handleMove;
+// Game update: not needed for this simple game, but required for future expansion
+game.update = function () {
+	// No per-frame logic needed
+};
\ No newline at end of file