About the game
Defeat wave after wave of invading alien ships while dodging frantically between barriers of various shapes and sizes, some stationary, some mobile.
Play endlessly in Practice mode, with no limit to the number of times you can be killed, or see how long you can survive with 6 lives (Normal mode) or a meager 3 lives (Hard mode).
How to play
Use the left and right arrow keys to move.
Your ship will fire automatically.
In Practice mode, press Q if you want to return to the title to change difficulty levels.
There are 15 waves per loop, and as many loops as you can survive.