Adding levels and progression is a core element of any engaging game. On Day 6, we’ll implement multiple levels, design transitions, and make the gameplay progressively more challenging.
1. Planning Levels and Progression
Game levels should:
- Introduce new challenges: Increase difficulty with each level.
- Change gameplay elements: Add new obstacles, enemies, or collectibles.
- Provide clear goals: Define conditions to complete a level.
2. Creating Level-Specific Scenes
Phaser allows creating separate scenes for each level. Let’s design two levels.
Step 1: Define Level Scenes
Create Level1.js and Level2.js in the phaser-game folder.
Level1.js:
import Phaser from 'phaser';
export default class Level1 extends Phaser.Scene {
constructor() {
super({ key: 'Level1' });
}
preload() {
this.load.image('player', 'assets/player.png');
this.load.image('collectible', 'assets/collectible.png');
}
create() {
this.add.text(10, 10, 'Level 1', { fontSize: '20px', color: '#ffffff' });
this.player = this.add.image(400, 300, 'player').setInteractive();
this.collectible = this.add.image(200, 200, 'collectible').setInteractive();
this.collectible.on('pointerdown', () => {
this.scene.start('Level2'); // Progress to Level 2
});
}
}
Level2.js:
import Phaser from 'phaser';
export default class Level2 extends Phaser.Scene {
constructor() {
super({ key: 'Level2' });
}
preload() {
this.load.image('player', 'assets/player.png');
this.load.image('collectible', 'assets/collectible.png');
}
create() {
this.add.text(10, 10, 'Level 2', { fontSize: '20px', color: '#ffffff' });
this.player = this.add.image(400, 300, 'player').setInteractive();
this.collectible = this.add.image(600, 400, 'collectible').setInteractive();
this.collectible.on('pointerdown', () => {
this.add.text(400, 300, 'You Win!', {
fontSize: '48px',
color: '#00ff00',
}).setOrigin(0.5);
});
}
}
3. Linking Levels in the Main Game
Step 1: Update the Main Phaser Game
In index.js, import the new scenes and configure them:
import Phaser from 'phaser';
import Level1 from './Level1';
import Level2 from './Level2';
const config = {
type: Phaser.AUTO,
width: 800,
height: 600,
backgroundColor: '#2d2d2d',
scene: [Level1, Level2], // Add the scenes here
};
export default new Phaser.Game(config);
4. Adding Difficulty Progression
Step 1: Modify Level Properties
Increase the number or speed of obstacles in Level 2:
create() {
this.obstacleSpeed = 200; // Faster movement in Level 2
this.obstacle = this.add.rectangle(400, 300, 50, 50, 0xff0000);
this.tweens.add({
targets: this.obstacle,
x: 700,
duration: this.obstacleSpeed,
yoyo: true,
repeat: -1,
});
}
5. Integrating with React Native
Update App.js to Render Levels
Modify the phaserHTML to dynamically load the levels:
const phaserHTML = `
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/phaser@3/dist/phaser.min.js"></script>
<script>
const Level1 = {
key: 'Level1',
preload: function () {
this.load.image('player', 'https://your-image-url.com/player.png');
this.load.image('collectible', 'https://your-image-url.com/collectible.png');
},
create: function () {
this.add.text(10, 10, 'Level 1', { fontSize: '20px', color: '#fff' });
this.collectible = this.add.image(200, 200, 'collectible').setInteractive();
this.collectible.on('pointerdown', () => this.scene.start('Level2'));
},
};
const Level2 = {
key: 'Level2',
preload: function () {
this.load.image('player', 'https://your-image-url.com/player.png');
this.load.image('collectible', 'https://your-image-url.com/collectible.png');
},
create: function () {
this.add.text(10, 10, 'Level 2', { fontSize: '20px', color: '#fff' });
this.collectible = this.add.image(600, 400, 'collectible').setInteractive();
this.collectible.on('pointerdown', () => {
this.add.text(400, 300, 'You Win!', { fontSize: '48px', color: '#00ff00' }).setOrigin(0.5);
});
},
};
const config = {
type: Phaser.AUTO,
width: 800,
height: 600,
backgroundColor: '#2d2d2d',
scene: [Level1, Level2],
};
new Phaser.Game(config);
</script>
</head>
<body></body>
</html>
`;
6. Running the Game
Step 1: Start the Development Server
npm start
Step 2: Test Level Transitions
Play the game in the Expo Go app and test transitions between levels.
7. Key Concepts Covered
- Creating multiple levels using Phaser scenes.
- Linking levels using
scene.start(). - Adding progression by increasing difficulty or changing elements.
Next Steps
On Day 7, we’ll focus on implementing animations and sprites to make the game visually engaging.
References and Links:
SEO Keywords: Phaser level creation, game progression in Phaser, linking scenes in Phaser, React Native game levels, Phaser game difficulty progression.
