Really great sounds and concepts all-round.
One thing I don't understand is how the up and down arrow keys affect your ship. Do they just adjust the angle at which your ship points so that the bullets can run into things instead of pass over them?
My primary difficulty with this one is that I find it nearly impossible to hit things. I can usually destroy satellites from around 100 units away, but I cannot collect their debris, or even so much as crash into it; I always go right past it. Also, I'm cofnused about whether the up/down arrow keys affect debris collection.
But maybe I'm doing something wrong.