The reload mechanic is really interesting, and well thought out - it's fun having to think about something that's usually automated in video games. Kind of reminds me of Cruelty Squad.
Besides that, I found this game to be quite wonderful. Simple, but with a fun mechanic that makes the whole thing interesting. I think the audio was the only part that was lacking (I think that the sounds were inconsistent in quality, like the amazing music contrasting with the gunshot that repeated twice and sounds like it was recorded with a tin can), but everything else here is golden. I'd like to see what you can do without a three (and a half) hour limit :)