A great game.

A very special rhythm game. I haven't anything like it so far.
A couple of the songs could use just a little resyncing, and the game may lag on some computers, like mine, throwing some of the music off the notes.
I personally think that the timing window for the notes should be made narrower. Sometimes, I would click an 8th beat off the note and it would count as a "fantastic". Also, sometimes, in a chain of the same color note, if you miss the first in the chain, and hit the second, it counts a hitting the first with the timing a bit off, and what should be the third hit in the chain becomes the second, and so on.
(I play keyboard mode, BTW)
But in any case, a few individualized category ratings.
Gameplay: 8/10
Music Quality: A bit low, probably you had to compress it to make it fit in the game, but thats OK.
Difficulty: I think it should have a few harder songs, even harder than [spoiler alert] Dash Hopes III (Not the EX version). To all those who think some songs are unbeatable, you are wrong. I have gotten at least A's on all the songs on all levels of difficulty, it was just...hard...kinda. But there should be one song that really is unbeatable, just for fun :)
Fun Factor: If you like music or rhythm games: 10/10
The songs themselves were great picks. They were of many different genres and styles, and anyone could find at least one song they like in this game.
Great job to the makers of this game. Your work has paid off.