I like how the screen wrapping actually duplicates the sprite over to the other side (so you're always on the screen). I guess you need that for a game like this because otherwise you could just camp out offscreen. I'm not sure about the aliens hanging out with you for a bit after reaching the bottom... I don't think it's a bad thing but it definitely made it a lot harder to move around. Also I really wish that the music didn't restart from the beginning every time you die.