It's a decent short entry.
Now are you ready to hear my complaint as a Touhou fan? Marisa is F A T T. OK I'm joking, it may be fine as is but as someone who plays the SHMUPs, it feels weird to have the character's hitbox being actually the sprite of the character instead of a small dot in the center. It's not an actual complaint, I can see you've balanced the game around this hitbox.
The patterns are easy... And the crystals, they're cool I guess. The gameplay isn't fully exploited to their full extent but that's because of the short time available.
I featured this game in my video, watch Marisa slay a god (for the Xth time now):
https://youtu.be/bFHWSZ1BOBw?t=3363
(Ah aussi: YOOOOOO c'est la France ici!?? PLease ignore this if I mistook it being French)