Great game! I am always reminded why it's improtant to participate in game jams - to force out the creativity! And this one is really great idea.
For my taste, the game becomes very cluttered very fast. In all the madness it's hard to read all the projectiles and I ended up going into the frey, collecting items and hoping I would get more health than I lose. But I have no prior experience to bullet-hell games, so there's that.
Keep up the great work!