/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Car class var Car = Container.expand(function () { var self = Container.call(this); var carSprite = self.attachAsset('car', { anchorX: 0.5, anchorY: 0.5 }); self.width = carSprite.width; self.height = carSprite.height; return self; }); // Obstacle class var Obstacle = Container.expand(function () { var self = Container.call(this); var obsSprite = self.attachAsset('obstacle', { anchorX: 0.5, anchorY: 0.5 }); // Set fixed size for all obstacles obsSprite.width = 200; obsSprite.height = 200; self.width = obsSprite.width; self.height = obsSprite.height; self.speed = 22; // pixels per frame, can be increased for difficulty self.update = function () { self.y += self.speed; }; return self; }); // ObstacleBlack class (large, rare, black) var ObstacleBlack = Container.expand(function () { var self = Container.call(this); var obsSprite = self.attachAsset('obstacleBlack', { anchorX: 0.5, anchorY: 0.5 }); obsSprite.width = 320; obsSprite.height = 320; self.width = obsSprite.width; self.height = obsSprite.height; self.speed = 22; self.update = function () { self.y += self.speed; }; return self; }); // ObstaclePurple class var ObstaclePurple = Container.expand(function () { var self = Container.call(this); var obsSprite = self.attachAsset('obstaclePurple', { anchorX: 0.5, anchorY: 0.5 }); obsSprite.width = 200; obsSprite.height = 200; self.width = obsSprite.width; self.height = obsSprite.height; self.speed = 22; self.update = function () { self.y += self.speed; }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x181818 }); /**** * Game Code ****/ // Road width: 1200px, centered // Game area: 2048x2732 // Car asset: blue box, 200x350 // Obstacle asset: red box, 200x200 // Road lane asset: gray box, 2048x2732 (background, not used as a background, but for lane lines) var ROAD_WIDTH = 1200; var ROAD_LEFT = (2048 - ROAD_WIDTH) / 2; var ROAD_RIGHT = ROAD_LEFT + ROAD_WIDTH; var CAR_Y = 2732 - 500; // Car vertical position // Draw lane lines (visual only) var laneLines = []; for (var i = 1; i < 4; i++) { var laneX = ROAD_LEFT + ROAD_WIDTH / 4 * i; for (var j = 0; j < 6; j++) { var line = LK.getAsset('laneLine', { anchorX: 0.5, anchorY: 0.5, x: laneX, y: j * 500 + 200, alpha: 0.25 }); game.addChild(line); laneLines.push(line); } } // Add left and right lane edge lines var edgeLines = []; for (var j = 0; j < 6; j++) { // Left edge (road boundary) var leftEdge = LK.getAsset('laneLine', { anchorX: 0.5, anchorY: 0.5, x: ROAD_LEFT, y: j * 500 + 200, alpha: 0.7 }); game.addChild(leftEdge); edgeLines.push(leftEdge); // Right edge (road boundary) var rightEdge = LK.getAsset('laneLine', { anchorX: 0.5, anchorY: 0.5, x: ROAD_RIGHT, y: j * 500 + 200, alpha: 0.7 }); game.addChild(rightEdge); edgeLines.push(rightEdge); // Far left vertical line (game border) var farLeft = LK.getAsset('laneLine', { anchorX: 0.5, anchorY: 0.5, x: 0 + 30, // 30px from the very left y: j * 500 + 200, alpha: 0.4 }); game.addChild(farLeft); edgeLines.push(farLeft); // Far right vertical line (game border) var farRight = LK.getAsset('laneLine', { anchorX: 0.5, anchorY: 0.5, x: 2048 - 30, // 30px from the very right y: j * 500 + 200, alpha: 0.4 }); game.addChild(farRight); edgeLines.push(farRight); } // Car var car = new Car(); car.x = 2048 / 2; car.y = CAR_Y; game.addChild(car); // Obstacles var obstacles = []; // Score var score = 0; var scoreTxt = new Text2('0', { size: 120, fill: "#fff" }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Touch controls var dragX = null; var dragStartCarX = null; // Move handler function handleMove(x, y, obj) { if (dragX !== null) { // Clamp to road var dx = x - dragX; var newCarX = dragStartCarX + dx; if (newCarX < ROAD_LEFT + car.width / 2) newCarX = ROAD_LEFT + car.width / 2; if (newCarX > ROAD_RIGHT - car.width / 2) newCarX = ROAD_RIGHT - car.width / 2; car.x = newCarX; } // Check collision for (var i = 0; i < obstacles.length; i++) { if (car.intersects(obstacles[i])) { LK.effects.flashScreen(0xff0000, 800); LK.showGameOver(); return; } } } // Touch down game.down = function (x, y, obj) { // Only allow drag if touch is on car or below if (y > car.y - car.height / 2 - 100) { dragX = x; dragStartCarX = car.x; handleMove(x, y, obj); } }; // Touch up game.up = function (x, y, obj) { dragX = null; dragStartCarX = null; }; // Move game.move = handleMove; // Main update game.update = function () { // Animate lane lines for road movement for (var i = 0; i < laneLines.length; i++) { laneLines[i].y += 22; if (laneLines[i].y > 2732 + 100) { laneLines[i].y -= 2732 + 400; } } // Animate edge lines for road movement for (var i = 0; i < edgeLines.length; i++) { edgeLines[i].y += 22; if (edgeLines[i].y > 2732 + 100) { edgeLines[i].y -= 2732 + 400; } } // Obstacles update for (var i = obstacles.length - 1; i >= 0; i--) { var obs = obstacles[i]; obs.update(); if (obs.y - obs.height / 2 > 2732 + 100) { // Passed, remove and score obs.destroy(); obstacles.splice(i, 1); score += 1; scoreTxt.setText(score); } else if (car.intersects(obs)) { LK.effects.flashScreen(0xff0000, 800); LK.showGameOver(); return; } } // --- Dynamic difficulty: obstacle speed and spawn rate scale with score --- // Calculate difficulty scaling var minSpawnInterval = 12; // minimum ticks between spawns (faster = more obstacles) var maxSpawnInterval = 40; // slowest spawn interval (start) var spawnInterval = Math.floor(maxSpawnInterval - Math.min(score, 60) * 0.4); // gets faster with score, clamps at min if (spawnInterval < minSpawnInterval) spawnInterval = minSpawnInterval; // Calculate speed scaling var baseSpeed = 22; var maxSpeed = 60; var speed = baseSpeed + Math.min(score, 100) * 0.35; // up to maxSpeed if (speed > maxSpeed) speed = maxSpeed; // Update all obstacle speeds to match current difficulty for (var i = 0; i < obstacles.length; i++) { obstacles[i].speed = speed; } // Also update lane line and edge line speeds for road movement for (var i = 0; i < laneLines.length; i++) { laneLines[i].y += speed; if (laneLines[i].y > 2732 + 100) { laneLines[i].y -= 2732 + 400; } } for (var i = 0; i < edgeLines.length; i++) { edgeLines[i].y += speed; if (edgeLines[i].y > 2732 + 100) { edgeLines[i].y -= 2732 + 400; } } // Spawn new obstacles if (LK.ticks % spawnInterval === 0) { // Random lane: 4 lanes var lane = Math.floor(Math.random() * 4); var laneCenter = ROAD_LEFT + ROAD_WIDTH / 8 + lane * (ROAD_WIDTH / 4); // 7% black, 18% big red (removed), 30% normal, 45% purple var obs; var r = Math.random(); if (r < 0.07) { obs = new ObstacleBlack(); } else if (r < 0.37) { obs = new Obstacle(); } else { obs = new ObstaclePurple(); } obs.x = laneCenter; obs.y = -obs.height / 2; obs.speed = speed; // set initial speed game.addChild(obs); obstacles.push(obs); } };