3rd release

• Add enemy ship and its behaviors
• Allow you to quit the game by pressing Esc key
• Harder (6 hazards per wave and release a wave every 2 seconds)

2nd release

• Add StarField particles and scrolling background for parallax feelings
• Add 2 more asteroids as hazards

Alpha release

First release. No enemy ship. Has only 1 asteroid hazard.
Support Portrait screen resolution (2:3 aspect ratio like 600:900)
Press Alt+F4 to exit the game.