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

/**** 
* Classes
****/ 
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerAsset = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1
	});
	// For jump animation
	self.isJumping = false;
	return self;
});
// Tree class
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeAsset = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Add a money icon on the tree
	var moneyAsset = self.attachAsset('money', {
		anchorX: 0.5,
		anchorY: 0.5,
		y: -treeAsset.height * 0.7
	});
	// Used to know if this tree has been collected
	self.collected = false;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1e5631 // deep forest green
});

/**** 
* Game Code
****/ 
/**** 
* Questions
****/ 
// Player asset: blue box
// Money asset: yellow box
// Tree asset: green ellipse
// Game constants
var QUESTIONS = [{
	q: "Combien de bananes faut-il pour faire un vélo ?",
	a: ["Aucune, c'est absurde !", "42", "3, si elles sont très grandes"],
	c: 0
}, {
	q: "Quel animal est le plus susceptible de devenir président ?",
	a: ["Le lama", "Le poisson rouge", "Le pigeon voyageur"],
	c: 2
}, {
	q: "Si un arbre tombe dans une forêt et que personne ne l’entend, fait-il du bruit ?",
	a: ["Oui, mais il chuchote", "Non, il chante", "Seulement les jours pairs"],
	c: 0
}, {
	q: "Quelle est la couleur du cheval vert d’Henri IV ?",
	a: ["Vert", "Bleu", "Invisible"],
	c: 0
}, {
	q: "Combien de lunes autour de la Terre un mardi ?",
	a: ["Une", "Trois", "Aucune, elles sont en vacances"],
	c: 0
}, {
	q: "Quel est le cri du billet de banque ?",
	a: ["Chling !", "Miaou", "Bip bip"],
	c: 0
}, {
	q: "Si tu plantes une pièce de 1€, que poussera-t-il ?",
	a: ["Un arbre à billets", "Un distributeur", "Un cactus doré"],
	c: 0
}, {
	q: "Quel est le sport préféré des arbres ?",
	a: ["Le tronc-volant", "Le basket-feuille", "Le branché-ball"],
	c: 1
}, {
	q: "Combien de temps met un escargot pour faire le tour d’un arbre ?",
	a: ["Le temps qu’il veut", "Jamais, il s’arrête pour dormir", "42 jours"],
	c: 0
}, {
	q: "Quel est le prénom du plus riche des arbres ?",
	a: ["Billet", "Feuille", "Racine"],
	c: 1
}];
var BOARD_WIDTH = 2048;
var BOARD_HEIGHT = 2732;
var GROUND_Y = 2300; // y position of the ground
var TREE_MIN_X = 200;
var TREE_MAX_X = BOARD_WIDTH - 200;
var TREE_MIN_Y = 800;
var TREE_MAX_Y = GROUND_Y - 200;
var TREE_COUNT = 5;
// Game state
var trees = [];
var player = null;
var score = 0;
var level = 1;
var moneyNeeded = 500;
var questionIndex = 0;
var currentTree = null;
var isQuestionActive = false;
var questionPanel = null;
var answerButtons = [];
var collectedMoney = 0;
var jumpTarget = null;
var canJump = true;
// GUI
var scoreTxt = new Text2('0 €', {
	size: 120,
	fill: 0xFFF700
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var levelTxt = new Text2('Niveau 1', {
	size: 80,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 130;
// Helper: random int
function randInt(min, max) {
	return min + Math.floor(Math.random() * (max - min + 1));
}
// Helper: pick random question (avoid repeats in a session)
function pickRandomQuestions(n) {
	var used = {};
	var arr = [];
	while (arr.length < n) {
		var idx = randInt(0, QUESTIONS.length - 1);
		if (!used[idx]) {
			arr.push(QUESTIONS[idx]);
			used[idx] = true;
		}
	}
	return arr;
}
// Place trees randomly
function spawnTrees() {
	// Remove old trees
	for (var i = 0; i < trees.length; i++) {
		trees[i].destroy();
	}
	trees = [];
	for (var i = 0; i < TREE_COUNT; i++) {
		var t = new Tree();
		// Random position, not too close to edges or each other
		var tries = 0;
		var ok = false;
		while (!ok && tries < 20) {
			t.x = randInt(TREE_MIN_X, TREE_MAX_X);
			t.y = randInt(TREE_MIN_Y, TREE_MAX_Y);
			ok = true;
			for (var j = 0; j < trees.length; j++) {
				var dx = t.x - trees[j].x;
				var dy = t.y - trees[j].y;
				var dist = Math.sqrt(dx * dx + dy * dy);
				if (dist < 400) ok = false;
			}
			tries++;
		}
		trees.push(t);
		game.addChild(t);
	}
}
// Place player at a random tree
function placePlayer() {
	var idx = randInt(0, trees.length - 1);
	var t = trees[idx];
	player.x = t.x;
	player.y = t.y - 10;
}
// Find nearest tree to (x, y) not already collected
function findNearestTree(x, y) {
	var minDist = 99999;
	var nearest = null;
	for (var i = 0; i < trees.length; i++) {
		if (trees[i].collected) continue;
		var dx = trees[i].x - x;
		var dy = trees[i].y - y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < minDist) {
			minDist = dist;
			nearest = trees[i];
		}
	}
	return nearest;
}
// Show question panel
function showQuestions(tree, onFinish) {
	isQuestionActive = true;
	questionPanel = new Container();
	// Panel background
	var panelBg = LK.getAsset('tree', {
		width: 1200,
		height: 900,
		color: 0x222222,
		anchorX: 0.5,
		anchorY: 0.5
	});
	panelBg.alpha = 0.95;
	questionPanel.addChild(panelBg);
	questionPanel.x = BOARD_WIDTH / 2;
	questionPanel.y = BOARD_HEIGHT / 2;
	// Pick 3 random questions
	var qs = pickRandomQuestions(3);
	// Ensure each question has only one correct answer (c always 0, and a[0] is the correct one)
	for (var i = 0; i < qs.length; i++) {
		if (qs[i].c !== 0) {
			// Swap correct answer to first position
			var correctIdx = qs[i].c;
			var tmp = qs[i].a[0];
			qs[i].a[0] = qs[i].a[correctIdx];
			qs[i].a[correctIdx] = tmp;
			qs[i].c = 0;
		}
	}
	questionIndex = 0;
	var correctCount = 0;
	var moneyWon = 0;
	// Question text
	var qTxt = new Text2('', {
		size: 70,
		fill: "#fff"
	});
	qTxt.anchor.set(0.5, 0);
	qTxt.y = -350;
	questionPanel.addChild(qTxt);
	// Answer buttons
	answerButtons = [];
	for (var i = 0; i < 3; i++) {
		var btn = new Container();
		var btnBg = LK.getAsset('money', {
			width: 900,
			height: 120,
			color: 0x3cb371,
			anchorX: 0.5,
			anchorY: 0.5
		});
		btn.addChild(btnBg);
		var btnTxt = new Text2('', {
			size: 55,
			fill: "#222"
		});
		btnTxt.anchor.set(0.5, 0.5);
		btn.addChild(btnTxt);
		btn.y = -100 + i * 180;
		btn.buttonIndex = i;
		btn.down = function (x, y, obj) {
			if (!isQuestionActive) return;
			var idx = obj.buttonIndex;
			var q = qs[questionIndex];
			if (idx === q.c) {
				correctCount++;
				// Give money for correct answer
				var moneyForThis = randInt(50, 100);
				score += moneyForThis;
				LK.setScore(score);
				scoreTxt.setText(score + " €");
				// Animate button green
				if (obj.children && obj.children[0]) {
					tween(obj.children[0], {
						tint: 0x83de44
					}, {
						duration: 200,
						onFinish: function onFinish() {
							if (obj.children && obj.children[0]) {
								tween(obj.children[0], {
									tint: 0x3cb371
								}, {
									duration: 200
								});
							}
						}
					});
				}
				// Animate money gain
				var moneyAnim = LK.getAsset('money', {
					width: 200,
					height: 100,
					color: 0xffe066,
					anchorX: 0.5,
					anchorY: 0.5
				});
				moneyAnim.x = 0;
				moneyAnim.y = 250;
				questionPanel.addChild(moneyAnim);
				var moneyText = new Text2("+" + moneyForThis + " €", {
					size: 70,
					fill: "#222"
				});
				moneyText.anchor.set(0.5, 0.5);
				moneyAnim.addChild(moneyText);
				tween(moneyAnim, {
					y: 100,
					alpha: 0
				}, {
					duration: 900,
					onFinish: function onFinish() {
						moneyAnim.destroy();
					}
				});
				// Check for level up after awarding money
				checkLevelUp();
			} else {
				// Animate button red
				if (obj.children && obj.children[0]) {
					tween(obj.children[0], {
						tint: 0xd83318
					}, {
						duration: 200,
						onFinish: function onFinish() {
							if (obj.children && obj.children[0]) {
								tween(obj.children[0], {
									tint: 0x3cb371
								}, {
									duration: 200
								});
							}
						}
					});
				}
			}
			// Next question or finish
			LK.setTimeout(function () {
				questionIndex++;
				if (questionIndex < 3) {
					setQuestion();
				} else {
					// Done: reward if at least 1 correct
					if (correctCount > 0) {
						moneyWon = randInt(50, 100) * correctCount;
						collectedMoney = moneyWon;
						score += moneyWon;
						LK.setScore(score);
						scoreTxt.setText(score + " €");
						// Animate money
						var moneyAnim = LK.getAsset('money', {
							width: 200,
							height: 100,
							color: 0xffe066,
							anchorX: 0.5,
							anchorY: 0.5
						});
						moneyAnim.x = 0;
						moneyAnim.y = 250;
						questionPanel.addChild(moneyAnim);
						var moneyText = new Text2("+" + moneyWon + " €", {
							size: 70,
							fill: "#222"
						});
						moneyText.anchor.set(0.5, 0.5);
						moneyAnim.addChild(moneyText);
						tween(moneyAnim, {
							y: 100,
							alpha: 0
						}, {
							duration: 900,
							onFinish: function onFinish() {
								moneyAnim.destroy();
								finishPanel();
							}
						});
						// Check for level up after awarding money
						checkLevelUp();
					} else {
						finishPanel();
					}
				}
			}, 400);
		};
		answerButtons.push(btn);
		questionPanel.addChild(btn);
	}
	// Set question/answers
	function setQuestion() {
		var q = qs[questionIndex];
		qTxt.setText(q.q);
		if (qTxt && typeof qTxt.setStyle === "function") {
			qTxt.setStyle({
				fill: 0xD83318
			}); // rouge vif pour la question
		}
		for (var i = 0; i < 3; i++) {
			answerButtons[i].children[1].setText(q.a[i]);
			if (answerButtons[i].children[1] && typeof answerButtons[i].children[1].setStyle === "function") {
				answerButtons[i].children[1].setStyle({
					fill: 0xD83318
				}); // rouge vif pour les réponses
			}
		}
	}
	// Remove panel and call onFinish
	function finishPanel() {
		isQuestionActive = false;
		if (questionPanel) {
			questionPanel.destroy();
			questionPanel = null;
		}
		answerButtons = [];
		if (onFinish) onFinish(correctCount > 0, collectedMoney);
	}
	setQuestion();
	game.addChild(questionPanel);
}
// Level up logic
function checkLevelUp() {
	if (score >= moneyNeeded) {
		level++;
		moneyNeeded *= 2;
		levelTxt.setText("Niveau " + level);
		// Flash effect
		LK.effects.flashScreen(0x83de44, 800);
		// Respawn trees, reset player
		spawnTrees();
		placePlayer();
	}
}
// Initialize game
function startGame() {
	score = 0;
	level = 1;
	moneyNeeded = 500;
	scoreTxt.setText("0 €");
	levelTxt.setText("Niveau 1");
	spawnTrees();
	if (player) player.destroy();
	player = new Player();
	game.addChild(player);
	placePlayer();
	canJump = true;
	isQuestionActive = false;
	if (questionPanel) {
		questionPanel.destroy();
		questionPanel = null;
	}
}
// Handle tap: jump to nearest uncollected tree
game.down = function (x, y, obj) {
	if (isQuestionActive || !canJump) return;
	// Find nearest uncollected tree not at current position
	var nearest = null;
	var minDist = 99999;
	for (var i = 0; i < trees.length; i++) {
		if (trees[i].collected) continue;
		var dx = trees[i].x - player.x;
		var dy = trees[i].y - player.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 50 && dist < minDist) {
			minDist = dist;
			nearest = trees[i];
		}
	}
	if (!nearest) return;
	canJump = false;
	player.isJumping = true;
	jumpTarget = {
		x: nearest.x,
		y: nearest.y - 10
	};
	// Animate jump
	var startY = player.y;
	var midY = startY - 180;
	tween(player, {
		y: midY
	}, {
		duration: 180,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			tween(player, {
				y: jumpTarget.y
			}, {
				duration: 180,
				easing: tween.easeIn,
				onFinish: function onFinish() {
					player.x = jumpTarget.x;
					player.y = jumpTarget.y;
					player.isJumping = false;
					canJump = true;
					// Check collision with tree
					for (var i = 0; i < trees.length; i++) {
						var t = trees[i];
						if (!t.collected && Math.abs(player.x - t.x) < 80 && Math.abs(player.y - (t.y - 10)) < 80) {
							t.collected = true;
							// Animate tree
							tween(t, {
								alpha: 0.3
							}, {
								duration: 400
							});
							// Show questions
							showQuestions(t, function (success, money) {
								if (success) {
									// Animate money to score
									LK.effects.flashObject(scoreTxt, 0xffe066, 600);
									checkLevelUp();
								}
								// If all trees collected, respawn
								var allCollected = true;
								for (var j = 0; j < trees.length; j++) {
									if (!trees[j].collected) allCollected = false;
								}
								if (allCollected) {
									spawnTrees();
									placePlayer();
								}
							});
							break;
						}
					}
				}
			});
		}
	});
};
// Prevent drag
game.move = function (x, y, obj) {
	// No drag, only tap to jump
};
// Main update loop
game.update = function () {
	// Nothing needed here for now
};
// Start game
startGame();

===================================================================
--- original.js
+++ change.js
@@ -214,8 +214,19 @@
 	questionPanel.x = BOARD_WIDTH / 2;
 	questionPanel.y = BOARD_HEIGHT / 2;
 	// Pick 3 random questions
 	var qs = pickRandomQuestions(3);
+	// Ensure each question has only one correct answer (c always 0, and a[0] is the correct one)
+	for (var i = 0; i < qs.length; i++) {
+		if (qs[i].c !== 0) {
+			// Swap correct answer to first position
+			var correctIdx = qs[i].c;
+			var tmp = qs[i].a[0];
+			qs[i].a[0] = qs[i].a[correctIdx];
+			qs[i].a[correctIdx] = tmp;
+			qs[i].c = 0;
+		}
+	}
 	questionIndex = 0;
 	var correctCount = 0;
 	var moneyWon = 0;
 	// Question text
@@ -251,8 +262,13 @@
 			var idx = obj.buttonIndex;
 			var q = qs[questionIndex];
 			if (idx === q.c) {
 				correctCount++;
+				// Give money for correct answer
+				var moneyForThis = randInt(50, 100);
+				score += moneyForThis;
+				LK.setScore(score);
+				scoreTxt.setText(score + " €");
 				// Animate button green
 				if (obj.children && obj.children[0]) {
 					tween(obj.children[0], {
 						tint: 0x83de44
@@ -268,8 +284,36 @@
 							}
 						}
 					});
 				}
+				// Animate money gain
+				var moneyAnim = LK.getAsset('money', {
+					width: 200,
+					height: 100,
+					color: 0xffe066,
+					anchorX: 0.5,
+					anchorY: 0.5
+				});
+				moneyAnim.x = 0;
+				moneyAnim.y = 250;
+				questionPanel.addChild(moneyAnim);
+				var moneyText = new Text2("+" + moneyForThis + " €", {
+					size: 70,
+					fill: "#222"
+				});
+				moneyText.anchor.set(0.5, 0.5);
+				moneyAnim.addChild(moneyText);
+				tween(moneyAnim, {
+					y: 100,
+					alpha: 0
+				}, {
+					duration: 900,
+					onFinish: function onFinish() {
+						moneyAnim.destroy();
+					}
+				});
+				// Check for level up after awarding money
+				checkLevelUp();
 			} else {
 				// Animate button red
 				if (obj.children && obj.children[0]) {
 					tween(obj.children[0], {