I was gonna say nice things, but then Yakumo pulled out the bowap+
Jokes aside, very nice danmaku! Especially for stuff that was whipped up over a weekend (nice reference). I'd say that as far as balancing goes, what urks me most is the pellet bullets blending into the background too much.
Regardless, I love that you used this jam as an opportunity to learn something new! I think it definitely turned out well and its clear you put the hours in! This was my first time playing something on Danmokou, so that was nice too.