Well I gotta say I damn well enjoyed that one. More polish than I expected given the tight time limit.
Visuals were solid and consistent all the way through, having a clean stylised chibi look that worked well for the most part. I liked the fusions visually though it could of been a touch more overt.
Backgrounds were also quite pretty with the light rays.
As for gameplay, it was decent. I enjoyed running around blasting with all 3, even though I think Youmu could use a touch more range. But that's just me. (She has a hard time reaching without a fusion)
And as for the fusions, I felt the concept was cool but could of been done better. For one, if you collect all 3, all 3 should always be active (I did have that happen but I suspect that's a bug). Because you can't control which one you really get if you accidentally have drops land on you. And you can lose your primary even, which seemed odd (And maybe a bug)
I'd make the fusions time out, as a way to encourage grabbing them.
Boss was simple but alright. Easy though.
Music was also a nice touch with it changing depending on the fusion.
Overall, I really enjoyed this one. You did damn well for a gamejam. Nice job
(Also if you want, you can check out our gamejam Danmaku Dragon, and give your own feedback :D) https://itch.io/jam/touhou-jam-6/rate/912501