Points, life, difficulty and GAME OVER

src/classes/Asteroid.ts

@@ -31,7 +31,7 @@ export default class Asteroid extends Phaser.Physics.Arcade.Sprite {
       Phaser.Math.RND.realInRange(-100, 100)
     )
     this.setRandomShade()
-    
+
     this.anims.play(Asteroid.getRandomAnimationName())
     this.anims.timeScale = 1 + (this.scaleMax - this.scale) * this.scaleRotationFactor
     if (Phaser.Math.RND.integer() % 2 == 0)
@@ -49,6 +49,7 @@ export default class Asteroid extends Phaser.Physics.Arcade.Sprite {
     if (!(bullet instanceof Bullet)) return
     if (bullet.active == false) return
 
+    me.scene.events.emit("asteroid:destroy")
     me.destroy() // TODO: use objects pool
     bullet.setActive(false)
     bullet.setVisible(false)

src/classes/DifficultyManager.ts

@@ -0,0 +1,55 @@
+import DefaultScene from '../scenes/DefaultScene'
+
+export default class DifficultyManager {
+  readonly spawnInterval = 1500 //ms
+  readonly maxAsteroids = 300
+  readonly intervalDecrementPerLevel = 30
+
+  private scene: DefaultScene
+  private difficultyLevel = 1
+  private points = 0
+
+  private spawnAtOnce = 1
+
+  constructor(scene: DefaultScene) {
+    this.scene = scene
+
+    scene.events.on('asteroid:destroy', () => {
+      this.points += 1
+      this.scene.events.emit("getpoint", this.difficultyLevel)
+
+      if (this.points % 10 == 0)
+        this.levelUp()
+    })
+
+    scene.time.addEvent({
+      delay: this.spawnInterval,
+      callback: this.spawnAsteroids,
+      callbackScope: this,
+      repeat: -1
+    });
+  }
+
+  levelUp() {
+    this.difficultyLevel += 1
+    this.spawnAtOnce += 1
+    this.scene.events.emit("lvlup", this.difficultyLevel)
+  }
+
+  spawnAsteroids() {
+    for (let i = 0; i < this.spawnAtOnce; ++i)
+      this.scene.spawnAsteroid()
+  }
+
+  getMaxAsteroids() {
+    return Math.min(this.difficultyLevel * 5, this.maxAsteroids)
+  }
+
+  getLevel() {
+    return this.difficultyLevel
+  }
+
+  getPoints() {
+    return this.points
+  }
+}

src/classes/Ship.ts

@@ -15,6 +15,7 @@ export default class Ship extends Phaser.Physics.Arcade.Sprite {
 
   bullets: Bullets
   thruster: Thruster
+  life = 3
 
   constructor(scene: Phaser.Scene) {
     super(
@@ -72,8 +73,14 @@ export default class Ship extends Phaser.Physics.Arcade.Sprite {
     if (!(asteroid instanceof Asteroid)) return
 
     if (asteroid.age > Asteroid.unbornAge) {
-      console.log("%cU ded", "color:red")
+      this.life -= 1
       this.scene.cameras.main.shake(100, 0.02)
+      asteroid.destroy() //TODO: use objects pool
+      this.scene.events.emit("ship:gothit")
+    }
+    
+    if (!this.life){
+      this.scene.events.emit("ship:destroyed")
     }
   }
 }