Frame, Panel, and Graphics

• Runner
• Game Background
• Change the State
• Add Text

Game Timer and Control Keys

• Game Loop (timer)
• Game Control (keys)

Game Characters

• Rocket (draw)
• Rocket (move)
• Alien and Projectile
• Model Management
• Add Images

Alien Control and Game Restart

• Alien and Projectile Spawn
• Collision Management
• Game End and Restart