Sometimes you don't really need great graphics. The only real thing that determines whether a game has good graphics is smooth animation and a coherent and compelling art style.
Destructivator is like that. With an interesting 8-bit art style, smooth animation, and well-executed gameplay, it's easily one of the better freeware indie games we've played. You must run, climb, jump, and shoot your way to the completion of each stage. You can take five hits, and your gun fires extremely rapidly, although you can only shoot it while standing on the ground. It's short but sweet, with 20 levels. It could definitely be improved with a level editor, but it's still incredibly fun. Here's hoping more is added to it later.