interesting game. One thing that I really don't like in this game is how long most songs are. Except for re:lation (weird name btw), all songs are a couple of minutes long. I personally don't like long levels, I think that one minute is enough, maybe two minutes, three minutes is already too much. Also, making shorter levels = easier to make ;)
I also didn't understood the pro mode. It really just feels the normal mode actually. And is kinda annoying the fact that even after you beat the level, if you click where there isn't a note, you miss
I also don't like that once you enter in a level, regardless of how long it is, you only can leave the level when it ends, esc doesn't do anything, and some levels are 7 minutes long sooooo