It's pretty simple. Use the arrows keys to move and the space bar to shoot. Don't touch the aliens, or you die. If you shoot the aliens, they die. Happy now?
I would like to thank FireEmerald for creating the graphics, scripts and everything else. If you would like to see something added to my game, tell me, or remix it. That's what the remix function is there for! Also, this is the first project I've made, so it might have a few flaws. Sorry! Also it's pretty short. Sorry again.