Wow you really ... knocked it out of the park... with the polish here. Simple and fun. Maybe some additional indicators as to how well you time certain things (like hitting the right arrows and how close you are to maximum X power) would help too.
Viewing post in Touhoumerun Derby: Tenshi's Danmaku Dreamteam jam comments
Hi (Tenshi and Sanae sprites maker here) Selene is planning on polishing the game when the GameJam voting time is over, so expect to see the indicators and even more ! If you're curious she made a list about the changes planned at the bottom of the game's page :)
Thank you playing and letting us know !