I keep coming back to this every once in a while. There are definitely some things that bug me about it a bit, mostly it always feeling a little unpolished, but I can't help liking the way it does what it does. A few years before it came out, I had a very similar idea and worked out some of the details but never went anywhere with it. It was really neat seeing what things he did the same way and what things were completely, totally different from anything I'd thought of. I like the creativity and variety in the different levels, both in terms of how they play and in their aesthetics. I also really appreciate that for once someone made a game with (at least somewhat) procedural music which is NOT electronic. It's all samples of guitars and stuff, which gives the whole game a totally different feel from the usual stuff like this. I just wish the actual "shooting and collecting points" part felt a little better than it does, but it's still reasonably fun.