Thanks Fred. We made this game to submit for two jams, one of them was "Mini Jam 6", the limitation was "Don't Use the Arrow keys, or WASD keys". Sorry if you don't like the choice of controls, it was just a limitation. Thanks again.
Edit: and I still have a lot of fun with the game myself!
I just uploaded a "post jam" version with more usual/traditional controls(but we've decided to keep mouse click for shooting), and also added some cool sounds.
I think boss 3 will still have some little improvements soon.