cool
Good concept, nice songs (there are better versions in the audio portal) but I found a few errors that I think you should be aware of to help you improve as a artist.
1- the timing for the notes is very far off, almost to the point your guessing. after the first 3 or 4 seconds of the song they go off without the song. this is also noticable because all songs end early no matter which you play. a slight timing tweak should fix this.
2- when you say hard you "mean" hard don't you??? :P the fairy song on very hard is litterally impossible to beat. which is strange cause I expected saria's song or another song to take that spot. not the fairy song
3- Audio choices... Make sure you scan the audio portal a few times before picking songs, this could prevent errors like 1 or 2 and add some unique qualities to the game, if you wish I can provide you with a few tracks that are of very high quality to replace those listed.
4- controls. The title screen was funny, felt like a Snes game screen, but when I went to options it changed. try to keep the controls nice and linear, it wasn't to annoying but it was an bothersome.
5- Graphics. You did pretty good on this, not much to say except the flawless point is slightly lower then it should be.
Comments: I'm also an aspring artist but I mostly do animation right now, the scripting isn't coming to me as fast as lua did, maybe because lua was a game itself and made working fun :P if I ever learn enough to make ddr/gh games I'll make one myself, but right now I'm on a platformer.
Have a great day btw todays my B-day :D