Learn to create a HTML5 Game in 5 Minutes - Bird

bird.ts

  update(): void {
    // handle angle change
    if (this.angle < 30) {
      this.angle += 2;
    }

    // handle input
    if (this.jumpKey.isDown && !this.isFlapping) {
      // flap
      this.isFlapping = true;
      this.body.setVelocityY(-350);
      this.scene.tweens.add({
        targets: this,
        props: { angle: -20 },
        duration: 150,
        ease: "Power0"
      });
    } else if (this.jumpKey.isUp && this.isFlapping) {
      this.isFlapping = false;
    }

    // check if off the screen
    if (this.y + this.height > this.scene.sys.canvas.height) {
      this.isDead = true;
    }
  }