First a little note about the actual release: it comes packaged with a shortcut which runs a .bat file... which just runs the game. It's a little silly; I had to go into the files to run the executable directly.
When I got in, it was a bit unclear what I had to do. I hit a lot of buttons until I figured out that I had to click a scene. Minor thing, but fine.
Gameplay wise. It's a visual novel, first and foremost. It's got the suggestion of a rhythm game; after I got frustrated with the difficulty of the first level, I learned that mashing (fast enough, though some sections were too fast for me) never dropped a combo, and I learned there wasn't a penalty for not playing at all in the next rhythm section. That's fine! Honestly, I was gonna judge it on the basis of a rhythm game for difficulty, but as-is I ended up treating it like a VN.
Writing's great. I love the treatment drummers get. It's also gay as hell.
However, I also gotta echo Kiroko: Parts of the music just went into horrific static in the VN sections. Really gotta fix that.