Depth?
Well, I could easily compare this to the previous Alien-themed game you submitted, and I think this was better, but not by much. My biggest complaints was that the depth perception just did nothing. I have no idea if I'm going to hit something and I still don't know what that space button does. For all of its faults though, I still have to praise this for having a lot of great graphics that really fit the mood and theme well.