I have a bit of mixed feelings with this game.
You see, the atmosphere and look of the game seem fantastic: that nostalgic summer breeze, just unbeatable. And quite original too. I like a lot the camera movements whenever a long note or taht thing were you mash come. However, the rhythm side of the game doesn't feel right to me. Sometimes the hitsounds don't go very well with the music. On top of that, some fragments of the songs don't seem to be very well charted, and the jump in difficulty from "hard" to "unbeatable" is very large. The offset wizard is also tedious to use since it takes you all the way back to the menu and you only have 12 notes to hit. However, the mechanics are really good, they add life to the classic note & long note formula. It would be nice to see some modifiers too.
I'm also having some problems with the framerate and resolution. It looks like when I change the resolution to 1366x768 it reverts back to 1920x1080. And, yeah, sometimes it feels laggy (which might be what's causing the bad rhythm feel to me, apart from the bad charting).
Anyways, I found this randomly and I quite like it. Seems very promising, but again, the rhythm doesn't feel quite right.