Not bad
Pretty good songs and music there. But I have to say there's not much new about this game. Not that it needs too much to make it a good game, a lot of people play DDR or games like these just for the fun of it some times and it's fine.
I find the colour scheme a little hard to follow. The metallic shine of the buttons makes them a little harder to see. I know that after a while you sort of memorize colours or which line is which button, but that takes quite a bit of playing to get adjusted to. For a beginner-ish person like me, I still depend on visual prompts to make sure I've got the correct arrow combination. And the colours made that a little hard at times.
And I also found myself scoring higher and better with the music turned off. Why? Because I felt at times alot of the buttons didn't line up with the music perfectly. Alot of these games rely on a steady pulse or a repeatable melody that's very rigid. Yours felt like it was floating alot here and there. I struggled to decide if the buttons were actually following a pulse at all and since most of the melodies weren't really distinct, i couldn't follow either.
Lining up the rhythm perfectly is the backbone of a good rhythm game. And I'm not sure it's there in this one.