Pretty self explanatory.

Click small enemies to make them die

Click and hold on larger enemies to bring down their health.

Don't let them escape off the edge of the screen.

You can customize all major variables of the game from the menu, play around with them a bit.

Command a lazer cannon and shoot lazers at red triangular spaceships causing them to die. That's it. That's the entire premise of the game.

I don't feel like retyping all the details.

http://www.stickpageportal.com/forums/showthread.php?t=57340

^^ go there to read more about the game.