Nearly Flawless
Tag-teaming with a partner is a nice concept for a shooter, and I don't mind most of the drawbacks of the game, but what's with the music? I understand that you're in space but I have one suggestion: at least add a password for the starting music... you know, the one that plays when starting the game. Otherwise, the game is great. With a nice 8-bit touch and a large array of upgrades, it's a game worth trying out.