This is a pretty charming little game! It's trying to do something very specific and it's executing it mostly really well. There's a lot of really good details such as the way the powerups spawn in and the screenshake and smooth movement of the boss; whose pattern is a good mix of simple and challenging. It's pretty comfy-- I'd say this game's biggest flaws are just gamefeel: It feels like the boss has a LOT of HP, and also when you shoot him there's no flash, no hit sound effect, no healthbar, and it doesn't feel "satisfying" at all. For a while I wondered if I was even doing damage or if my shots were just dinking off his head. It's a minor thing, but it's pretty crucial since the entire game is just the boss fight. It's cute, though!