The biggest issue I had with your game is that hitboxes are kind of weird or just impossible to gauge as a player. The 2nd biggest one is that you can just run through without fighting at all, which I did on my 2nd attempt.
The art that is in place is nice, the boss is really cube cute as well. The turrets having rigidbodies is a nice touch!
Other that that with a bit more time to add art and sound and a bit more polish. Perhaps a reason to kill enemies, this would be a good game instead of what feels like a prototype!