Mario-style platformer · gemma-4-26b-a4b-it

Okay, `phaser.min.js` is available. Now I will write `index.html`.

I'll structure the code as follows:
- `index.html`
    - `<style>` for basic layout.
    - `<script src="phaser.min.js"></script>`
    - `<script>` for the Phaser game.

Game Logic Details:
- **Textures**:
    - `player`: A simple block with eyes (to make it look a bit more like a character).
    - `platform`: Brown rectangle.
    - `coin`: Yellow circle.
    - `enemy`: Red square with eyes.
    - `goal`: Green flag/pole.
    - `background`: Sky blue.
    - `ground`: Green/Brown rectangle.

- **Level Design**:
    - A long horizontal level with some jumps.
    - Platforms at different heights.
    - Gaps to fall through.
    - Coins scattered.
    - Enemies walking left/right on platforms.

- **Physics**:
    - Arcade Physics.
    - Gravity on Y axis.
    - `player.body.allowDeceleration = true;` (for better feel).

- **Collision Handling**:
    - `player` vs `platforms` -> standard collider.
    - `player` vs `coins` -> overlap.
    - `player` vs `enemies` -> collider or overlap?
        - If `player.body.wasTouchingBottom` and `enemy.body.wasTouchingTop` (or similar) -> enemy dies, player bounces.
        - Else -> player dies.
        - Wait, `wasTouchingBottom` might be tricky with arcade physics if they are moving.
        - Better: Use `collider` for player-enemies and check `player.body.touching.down` and `enemy.body.touching.up`.

- **States**:
    - `game_over`
    - `win`
    - `playing`

Let's start writing the code.

<|channel>thought The code for `index.html` looks mostly correct, but I need to make sure the `phaser.min.js` is loaded correctly and the logic is sound. One issue: `this.physics.add.collider(player, enemies, hitEnemy, null, this);` might not work as expected because `hitEnemy` is a function defined in the global scope, but I'm passing `this` as the context. Actually, I should define the functions inside the scene or use `this` correctly. Let's refine the `index.html` code. I'll use a single `scene` object for everything to make it cleaner. Also, I noticed `enemy.kill()` is deprecated in newer Phaser versions, I should use `enemy.destroy()`. And `this.physics.add.collider(player, enemies, hitEnemy, null, this)` - the `this` refers to the scene. Let's check if I can use `this.physics.add.collider(player, enemies, (p, e) => {... },...)` to avoid scope issues. I'll also add some improvements to the level and the "Mario-inspired" look. Wait, I should check if `this.keys.left.isDown` etc. works with `createCursorKeys()`. Yes, it does. Let's rewrite `index.html` more robustly. <channel|><|channel>thought I've written the code. Now I will run it using the `browser` tool to verify it meets all requirements. <channel|>

The user wants me to build a playable side-scrolling platformer using Phaser.

**Requirements:**
- One completable scrolling level.
- Solid platforms, gaps, collectible coins, patrolling enemies, a goal flag.
- Controls: Left/Right or A/D for movement, Space for jumping.
- Display controls.
- Gravity, platform collision, prevent double jumps (mid-air jumping).
- Enemy mechanics:
    - Landing on top = defeat + bounce player.
    - Side contact or falling into a gap = loss.
- Coin collection: increases count, removes coin.
- Goal flag: shows win state.
- Camera: follows player within level bounds.
- Restart functionality: resets coins, enemies, player, and camera.
- Graphics: All generated via Phaser Graphics/textures (no external assets).
- Single file: `index.html` containing HTML, CSS, and JS.
- Use `phaser.min.js` from the current directory.

**Plan:**
1.  Check if `phaser.min.js` exists.
2.  Write `index.html` with:
    - CSS for a basic layout.
    - HTML structure.
    - Phaser game logic:
        - `preload`: Generate textures using `graphics`.
        - `create`: Setup world, player, platforms, coins, enemies, goal, camera, UI.
        - `update`: Handle inputs, movement, enemy patrolling, collision detection, death/win checks.
        - Classes or objects for Player, Enemy, Coin, Platform, Goal.
3.  Testing (simulated in my head, then I'll verify if I can run it, but I can only "test" by providing the code and describing what it should do, or I can try to run a headless check if possible, but usually I just write the code). Wait, I can't actually run the browser here to "inspect the initial output", but I can write the code and ensure it's correct. The instructions say "Run the application in the browser and inspect...". I'll assume I should write the code and then if there's a way to run it, I will. In this environment, I usually just write the file.

**Graphics Generation Plan:**
- Player: A simple colorful square or a small character shape.
- Platforms: Green/Brown rectangles.
- Coins: Yellow circles.
- Enemy: Red squares/circles.
- Goal Flag: A flagpole with a colored flag.
- Background: Blue sky.

**Implementation Details:**
- Use `this.add.graphics()` to create textures.
- `this.textures.addCanvas` or `this.add.graphics().generateTexture(...)` to turn graphics into textures.
- Physics: `arcade physics`.

**Code Structure:**
- `index.html`
  - `<style>`
  - `<body>`
    - `<div id="game-container"></div>`
    - `<script src="phaser.min.js"></script>`
    - `<script>`
      - Phaser Config (Type: Phaser.AUTO, Physics: Arcade, Scene: MainScene)
      - MainScene:
        - `preload()`: generate textures (player, platform, coin, enemy, flag, background).
        - `create()`:
          - Groups: platforms, coins, enemies, goal.
          - Player creation + physics.
          - Camera setup (start following player).
          - Input setup (cursors, keys).
          - Text for UI (Coins, Score/Message).
        - `update()`:
          - Player movement logic.
          - Enemy patrolling logic (reverse direction on edge or wall).
          - Collision checks (player-enemy, player-coin, player-platform).
          - Death checks (player height > world height, player-enemy side contact).
          - Win checks (player-goal).
        - `resetGame()`: resets all entities.

Let's refine the enemy logic:
- Enemy moves left/right.
- `checkCollision` with edge of screen or platform? Usually, patrol between two X coordinates or until hit a wall.

Let's refine the "defeat enemy" logic:
- If `player.body.wasTouchingTop` and `enemy.body.wasTouchingBottom` (or similar) during collision -> enemy dies, player bounces.
- Actually, Phaser's `overlap` doesn't give direction easily. Better to check `player.body.velocity.y > 0` and `enemy.body.position.y < player.body.position.y`. Wait, if player is falling, they are above.

Let's write the code.

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default: 'arcade', arcade: { gravity: { y: 800 }, debug: false } }, scene: { preload: preload, create: create, update: update } }; const game = new Phaser.Game(config); let player; let platforms; let coins; let enemies; let goal; let cursors; let keys; let coinCount = 0; let coinText; let gameState = 'playing'; // 'playing', 'win', 'lose' let gameObjects = {}; function preload() { // Generate textures const graphics = this.add.graphics(); // Player Texture graphics.fillStyle(0x00ff00); graphics.fillRect(0, 0, 32, 32); graphics.generateTexture('player', 32, 32); graphics.clear(); // Platform Texture graphics.fillStyle(0x8B4513); graphics.fillRect(0, 0, 32, 32); graphics.generateTexture('platform', 32, 32); graphics.clear(); // Coin Texture graphics.fillStyle(0xFFFF00); graphics.fillCircle(10, 10, 10); graphics.generateTexture('coin', 20, 20); graphics.clear(); // Enemy Texture graphics.fillStyle(0xff0000); graphics.fillRect(0, 0, 32, 32); graphics.generateTexture('enemy', 32, 32); graphics.clear(); // Goal Texture graphics.fillStyle(0xffd700); graphics.fillRect(0, 0, 40, 80); graphics.generateTexture('goal', 40, 80); graphics.clear(); // Background Texture graphics.fillStyle(0x87CEEB); // Sky Blue graphics.fillRect(0, 0, 800, 600); graphics.generateTexture('bg', 800, 600); } function create() { // Add background this.add.image(400, 300, 'bg'); // Level Design platforms = this.physics.add.staticGroup(); // Ground for (let i = 0; i < 25; i++) { platforms.create(i * 32, 584, 'platform'); } // Floating Platforms createPlatform(this, 200, 450, 3); createPlatform(this, 500, 400, 3); createPlatform(this, 200, 300, 2); createPlatform(this, 600, 250, 4); createPlatform(this, 300, 150, 2); // Player player = this.physics.add.sprite(100, 450, 'player'); player.setBounce(0.1); player.setCollideWorldBounds(true); // Coins coins = this.physics.add.group({ key: 'coin', repeat: 15, setXY: { x: 100, y: 0, stepX: 120 } }); coins.children.iterate(function(child) { child.setBounceY(Phaser.Math.FloatBetween(0.4, 0.8)); // Randomly position coins on platforms child.setX(Phaser.Math.Between(100, 2000)); child.setY(Phaser.Math.Between(100, 500)); }); // Enemies enemies = this.physics.add.group(); createEnemy(this, 600, 550); createEnemy(this, 1200, 550); createEnemy(this, 1800, 550); // Goal goal = this.physics.add.staticSprite(2200, 500, 'goal'); // Physics Collisions this.physics.add.collider(player, platforms, handlePlayerCollision, null, this); this.physics.add.collider(enemies, platforms, (enemy, platform) => { enemy.body.setAccelerationX(enemy.body.accelerationX * -1); }, null, this); this.physics.add.collider(player, enemies, handleEnemyCollision, null, this); this.physics.add.overlap(player, coins, collectCoin, null, this); this.physics.add.overlap(player, goal, reachGoal, null, this); // Controls cursors = this.input.keyboard.createCursorKeys(); keys = this.input.keyboard.addKeys('A,D,SPACE'); // UI coinText = document.getElementById('coin-count'); // Camera this.cameras.main.setBounds(0, 0, 2500, 600); this.cameras.main.startFollow(player, true, true); // Instructions this.add.text(16, 16, 'Move: A/D or Left/Right\nJump: Space', { fontSize: '16px', fill: '#fff', backgroundColor: '#00000088' }); } function createPlatform(scene, x, y, count) { for(let i = 0; i < count; i++) { platforms.create(x + (i * 32), y, 'platform'); } } function createEnemy(scene, x, y) { const enemy = enemies.create(x, y, 'enemy'); enemy.setBounce(1); enemy.setCollideWorldBounds(true); enemy.body.setAccelerationX(100); enemy.body.setDrag(100); } function handlePlayerCollision(player, platform) { // Standard collision handling } function handleEnemyCollision(player, enemy) { if (player.body.velocity.y > 0 && player.body.y < enemy.y) { // Landed on top enemy.destroy(); player.setVelocityY(-400); // Bounce player } else { // Hit from side gameOver(this, 'LOSE'); } } function collectCoin(player, coin) { coin.disableBody(true, true); coinCount++; coinText.innerText = `Coins: ${coinCount}`; } function reachGoal(player, goal) { gameOver(this, 'WIN'); } function gameOver(scene, result) { if (gameState!== 'playing') return; gameState = 'ended'; const textStyle = { fontSize: '64px', fill: '#fff', align: 'center' }; const resultText = result === 'WIN'? 'YOU WIN!' : 'GAME OVER'; const color = result === 'WIN'? '#00ff00' : '#ff0000'; scene.add.text(player.x, 300, resultText, {...textStyle, fill: color }).setOrigin(0.5); const restartBtn = scene.add.text(player.x, 400, 'Click to Restart', { fontSize: '32px', fill: '#fff' }).setOrigin(0.5).setInteractive(); restartBtn.on('pointerdown', () => { scene.scene.restart(); coinCount = 0; coinText.innerText = `Coins: 0`; }); } function update() { if (gameState!== 'playing') return; // Movement if (cursors.left.isDown || keys.A.isDown) { player.setVelocityX(-200); } else if (cursors.right.isDown || keys.D.isDown) { player.setVelocityX(200); } else { player.setVelocityX(0); } if (cursors.up.isDown || keys.SPACE.isDown) { if (player.body.touching.down) { player.setVelocityY(-500); } } // Enemy patrol logic enemies.children.iterate(function(enemy) { if (enemy.body.blocked.left || enemy.body.blocked.right) { enemy.body.setAccelerationX(-enemy.body.accelerationX); } }); // Fall off world if (player.y > 580) { gameOver(this, 'LOSE'); } } </script> </body> </html> ```