Probably one of the best game I've rated so far.
It needs to be played more!
The gameplay loop work and is smooth, you allowed two way to control which is a godsend when you can't really do it with wasd !
A small cons I would have is it isn't really clear that the game scale at first, and how you get more gun/power up.
The score add more replayability, my best so far was 10-12k :D
Good jam!