一款充满挑战性的另类射击游戏，使用了一个独特的开关机制，玩家可以经底部到顶部的屏幕受控制，避免敌人的炮火。玩家只需要控制着自己的战机，尽可能的去消灭不断袭来的敌人，并且让自己存活下去获得更高的分数就行。

版本 1.1 中的新功能

GAMEPLAY ADDITIONS
• Dark mode added: 150 faster, harder waves with a new backgrounds and new perspective on the story.
• 3 new achievements.
• 7 new leaderboards.

CONTROL IMPROVEMENTS
• Reduced the width of the slider on iPad (normal and wide settings).
• Reduced width between movement buttons in ARCADE control mode.
• Added option to adjust distance between movement buttons.

GRAPHICS IMPROVEMENTS
• Performance improvements, particularly for low-end devices.
• Enhanced particle and graphics effects for faster devices.
• iPad2 and iPhone 4S have fully enhanced graphical effects.
• Adjustable graphics settings based on device speed.

OTHER IMPROVEMENTS
• Save game corruption issue fixed.
• Playing your own music now works.
• Other minor fixes.