Pretty damn solid game here. Just wanted to say that it crashed on me whenever I tried killing the dummy enemies in the tutorial though. Presentation wise, I'd say it was minimal but still pretty cool. Very readable at a glance and complemented the fast paced nature of the game.
The boss as a whole was designed pretty well. While some of it's attack patterns were definitely random, it still managed to be pretty fair. They definitely forced me to move around quite a lot and also time my shots.
My only complaint is that I think the implementation of the theme is a little loose. That said, I do like that charging your attack causes your bullets to spin around you, which you can also use to attack. I do feel more could've been done with this, but what is here is still pretty fun
All in all, this was a pretty polished and fun little game. Kudos to both of you