Awesome job!
As others have already said, the controls felt super smooth and intuitive. I really liked that the keyboard only controlled the movement, and not also the aiming direction.
I think a small improvement would be to have the camera "follow" the mouse/player, rather than stick right to it. Sometimes if I moved the mouse to the other end of the screen the camera kinda jumped a bit too fast, and that felt a bit jarring. But that wasn't enough to keep me from playing!
Great job, this is the perfect kind of game jam game! Well done!