Cool game! I agree with Kneehat that it took a few minutes to figure out what stuff was supposed to do, but it was a lot of fun after that! It's also an impressive amount of polish for a game jam game. The camera, models, and map all looked really clean.
I was disappointed that the difficulty never really scaled up, but it's a game jam game, so w/e
My biggest complaint is the lack of feedback in the controls. Buying a turret doesn't have any feedback other than changing the HUD. Also, the wrench swing both interrupts itself and doesn't do anything until the end of the animation: if you're clicking fast to get a turret up as fast as possible, the character will wiggle the wrench around while accomplishing nothing.
Overall I think it's a great entry, but I think it needs some minor tweaks that would make it a lot better.