Good job. Simplistic games like suika go well together with H rewards. Improvements would be fixing the next-up display bug, adding a chart of the orb sizes and a reward for clearing the game.
Also, what song did you use? I assume it's from Touhou, or is it an original?
I would suggest adding a credit screen where these sort of details are listed, add a link to your Itch.io page too since stuff like this gets reposted at random sites.