Wow, I find this super impressive for a jam game. An FPS with multiplayer support (although I haven't tested the multiplayer). Most jammers stick to 2D and I have no idea how to work with 3D so I generally find this stuff quite cool for jams.
I feel like the main thing hurting this game is that only a windows version is available - so not as many people will play it. I had to use wine to run it in linux and so I'm guessing that's why it crashed for me, but nevertheless really impressed. Nice sound effects and models. Good job :)