You got many things right in this one! The use of confined-theme works well, but is not too overwhelming and the bullet patterns and the overall feel remind me of Touhou, which is a good thing! Also, the first boss throwing pizza absolutely gets extra points from me xD The fact that many times as boss moved, it was difficult to continue shooting it, so that is maybe one place where the game could be improved. But overall, very succesful entry!
Check out our game as well, if you have time! :)