Nice song, almost perfect map. I'm just being nazi in this post, so feel free to ignore me :P
Relax Mode:
01:23:65 (5) - The way this ends doesn't sound right. I'd say remove one repeat. D:
Hard:
00:16:26 (5) - Move 1 square up (level 3 grid)...
00:16:72 (1,2,3,4,5,6,7) - And move these 1 square to the right.
00:21:80 (2) - Move this 1 square to the left (why am I being so nazi? lol XD)
00:41:65 (1) - Add clap?
00:42:57 (6) - ^ (In realtà tutta questa parte 00:41:65 (1,2,3,4,5,6,1,2,3,4,5) avrebbe bisogno di hitsounds. Se non vuoi mettere i clap, trova un altro modo... l'importante è che ci siano i suoni!)
00:59:18 (1,2,3,4) - Not snapped? D:
01:24:57 (3) - Like in Relax Mode, I'm not sure about this one. See what you can do D:
Insane:
00:41:65 (1,2,3,4,5,6,1,2,3,4,5,6,7) - Same as Hard
00:59:18 (1,2,3,4) - Not snapped? D: Oh, ok è snappato in 1/3, ma non penso vada bene. Mi suona un po' strano. D:
01:24:68 (10) - Same as the other diffs xD
Also, I'd lower the HP Drain in this diff, just 1 notch D:
Starred, of course!