Cool game, it's nice to see something in 3D. You nailed the visuals, and I like the main mechanic. The audio was nice and fit the game well, but the "song" got very grating after awhile.
My main complaint was the lack of any UI, or at the very least a health bar. It's very hard to tell how much health you have, and that affects the game more than you might think.
Overall I thought it was fun, I had a good time with it, and I'd really like to see this one updated after the jam (maybe some different enemy types or something, I could see this being a very interesting game).
Good job!