The game is pretty fun. It is engaging and can definitely be built out into a further complete project. The core of an idea of definitely there.
Biggest piece of feedback for me is that the UI breaks the immersion. I'm not UI wizard so I can't be super helpful here with specifics, but something about the menus and such seem like they're misplaced. Though I'm sure this can be easily fixed with some art tweaking.
Well done.
Edit: I think it's actually the juxtaposition between the lower poly art and the menu font / layout. But that's just my 2 cents.