/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); /**** * Classes ****/ // Platform class var Platform = Container.expand(function () { var self = Container.call(this); var plat = self.attachAsset('platform', { anchorX: 0.5, anchorY: 0.5 }); // For collision, store width/height self.width = plat.width; self.height = plat.height; return self; }); // Player class var Player = Container.expand(function () { var self = Container.call(this); var playerGfx = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); // Physics self.vx = 0; self.vy = 0; self.isJumping = false; self.jumpPower = 68; // increased jump velocity for higher jumps self.movePower = 36; // increased horizontal velocity for farther jumps self.gravity = 2.2; // gravity per frame self.maxFall = 60; // max fall speed // For collision self.width = playerGfx.width; self.height = playerGfx.height; // Update method self.update = function () { // Apply gravity self.vy += self.gravity; if (self.vy > self.maxFall) self.vy = self.maxFall; // Move self.x += self.vx; self.y += self.vy; // Friction for horizontal movement self.vx *= 0.92; if (Math.abs(self.vx) < 0.2) self.vx = 0; // Prevent going off left/right if (self.x < self.width / 2) { self.x = self.width / 2; self.vx = 0; } if (self.x > 2048 - self.width / 2) { self.x = 2048 - self.width / 2; self.vx = 0; } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x222244 }); /**** * Game Code ****/ // Game variables // Character: red box // Platform: green box var platforms = []; var player; var score = 0; var scoreTxt; var cameraY = 0; // how much the world is scrolled up var platformSpacing = 220; // reduced vertical distance between platforms for easier jumps var minPlatformX = 120; var maxPlatformX = 2048 - 120; var dragNode = null; var lastHighestPlatformY = 0; var gameOver = false; // Score display scoreTxt = new Text2('0', { size: 120, fill: 0xFFFFFF }); scoreTxt.anchor.set(0.5, 0); LK.gui.top.addChild(scoreTxt); // Helper: create a platform at (x, y) function createPlatform(x, y) { var plat = new Platform(); plat.x = x; plat.y = y; platforms.push(plat); game.addChild(plat); return plat; } // Helper: find the platform the player is standing on (returns platform or null) function getStandingPlatform() { for (var i = 0; i < platforms.length; ++i) { var plat = platforms[i]; // Check if player is falling, and feet are just above platform var px = player.x; var py = player.y + player.height / 2; var left = plat.x - plat.width / 2; var right = plat.x + plat.width / 2; var top = plat.y - plat.height / 2; var bottom = plat.y + plat.height / 2; // Allow a little leeway for collision if (px > left + 10 && px < right - 10 && py > top - 10 && py < bottom + 10 && player.vy >= 0) { return plat; } } return null; } // Helper: remove platforms that are far below the camera function cleanupPlatforms() { for (var i = platforms.length - 1; i >= 0; --i) { if (platforms[i].y - cameraY > 2732 + 200) { platforms[i].destroy(); platforms.splice(i, 1); } } } // Helper: generate platforms above the highest one function generatePlatforms() { // Find highest platform var highestY = 2732; for (var i = 0; i < platforms.length; ++i) { if (platforms[i].y < highestY) highestY = platforms[i].y; } // Generate up to fill above while (highestY > cameraY - 400) { var px = minPlatformX + Math.random() * (maxPlatformX - minPlatformX); highestY -= platformSpacing + (Math.random() - 0.5) * 80; createPlatform(px, highestY); } } // Helper: update score if player lands on a higher platform function updateScore(plat) { if (plat && plat.y < lastHighestPlatformY) { score += 1; scoreTxt.setText(score); lastHighestPlatformY = plat.y; } } // Game start: setup player and initial platforms function startGame() { // Reset for (var i = 0; i < platforms.length; ++i) platforms[i].destroy(); platforms = []; score = 0; scoreTxt.setText(score); cameraY = 0; lastHighestPlatformY = 0; gameOver = false; // Create initial platforms var baseY = 2732 - 220; for (var i = 0; i < 8; ++i) { var px = 1024; if (i > 0) px = minPlatformX + Math.random() * (maxPlatformX - minPlatformX); var plat = createPlatform(px, baseY - i * platformSpacing); if (i === 0) lastHighestPlatformY = plat.y; } // Create player if (player) player.destroy(); player = new Player(); player.x = platforms[0].x; player.y = platforms[0].y - player.height / 2 - platforms[0].height / 2 - 2; player.vx = 0; player.vy = 0; game.addChild(player); } // Input: tap/click to jump game.down = function (x, y, obj) { if (gameOver) return; // Convert to game coordinates var gx = x; var gy = y; // Only allow jump if not already jumping (i.e. standing on platform) var plat = getStandingPlatform(); if (plat && player.vy >= 0) { // Direction: from player to tap var dx = gx - player.x; var dy = gy - player.y; // Only allow upward jumps if (dy < -40) { // Normalize var len = Math.sqrt(dx * dx + dy * dy); if (len < 1) len = 1; var nx = dx / len; var ny = dy / len; // Set velocity: bounce much higher for up, less for sideways, both exaggerated var jumpStrength; if (ny < -0.85) { // Strong upward tap: bounce much higher jumpStrength = player.jumpPower * 2.2; player.vx = nx * player.movePower * 0.7; // less sideways } else { // Sideways: bounce less, but still a lot jumpStrength = player.jumpPower * 1.2; player.vx = nx * player.movePower * 1.5; // more sideways } player.vy = ny * jumpStrength; player.isJumping = true; } } }; // Camera follows player upward function updateCamera() { // Camera follows player upward only var targetY = player.y - 900; if (targetY < cameraY) { cameraY = targetY; } // Clamp cameraY to 0 (bottom) if (cameraY > 0) cameraY = 0; // Move all game objects (except GUI) by -cameraY for (var i = 0; i < platforms.length; ++i) { platforms[i].yOnScreen = platforms[i].y - cameraY; platforms[i].y = platforms[i].yOnScreen; } if (player) { player.yOnScreen = player.y - cameraY; player.y = player.yOnScreen; } } // Main update loop game.update = function () { if (gameOver) return; // Update player if (player) player.update(); // Camera updateCamera(); // Generate new platforms if needed generatePlatforms(); // Remove old platforms cleanupPlatforms(); // Check for landing on platform var plat = getStandingPlatform(); if (plat && player.vy >= 0) { // Snap player to platform player.y = plat.y - plat.height / 2 - player.height / 2 - 2; // Add bounce: if falling fast, bounce up with a stronger effect (more bounce) if (player.vy > 10) { player.vy = -player.vy * 0.7; // bounce up, lose less energy for more bounce player.isJumping = true; } else { player.vy = 0; player.isJumping = false; updateScore(plat); } } // Game over: if player falls below bottom of screen if (player && player.y - cameraY > 2732 + 120) { gameOver = true; LK.effects.flashScreen(0xff0000, 800); LK.showGameOver(); } }; // Start game startGame();