There's definitely the idea of a game here for sure. I think committing to the shapes instead of enemies is fascinating if you're going for a more retro-inspired look. Matching up the music with that in mind would have done wonders. That said, it was kind of confusing to know what was what. Apparently the white circles are good, but they behave like something bad (since other white shapes are enemies), so it complicates gameplay. The hitbox was also extremely large for a Touhou game; I found myself dead very often from getting pixel-clipped-- which is especially a pain when you only have three lives and the bullets are the size of you.

All said, however, for a three-day project, this is pretty interesting. I would have been very interested to see what it looked like with about a week or so instead.

- Gotta say, why make the items the same colour as some enemies?
- KInda questionnable gameplay thing: the hitbox is the entire sprite when unfocused, and the small circle when focused. That sure was confusing when I died to a missile that clipped my foot (as a Touhou player). Is it by design?

The mix-and-match part of the shottype is interesting though.

nice little shmup though fairly undercooked. But if you made it from scratch in 3 days then good job. Though the visuals are fairly dry. I recommend you try your hand at pixel art for the enemies. Even if you're not good at it it is still better than the enemies being just shapes. Also, for designing the shmup stages, i recommend having less downtime between each wave of enemies.