Gonna repeat a criticism from a lot of the other comments, but if you miss, the game should basically end right there. I attempted to snipe a guy a long ways away, but I suppose it hadn't fully loaded in (or I'm a bad shot) and I missed. Couldn't figure out what to do from there other than restart manually.
Still, issues aside, for a two day project and a first attempt at 3D, this was a good go, and I hope you keep making games!