General:
I don't really how the video goes blank for awhile, then appears, then it repeats. Also, your SB is a bit odd imo.
Hard:
00:02:10 (2) - Too close to (1).
01:01:53 (1,2,3) - This is a little too big spacing - please tone it down a bit.
01:26:44 (1,2,3,4,5,6,1,2,3,4,5,6) - It looks fun to play, but it looks messy. Can you fix it maybe?
01:51:63 (1) - Remove new combo. 1/4th back on the timeline, then move 01:51:91 (2) away.
01:52:29 (3) - New combo.
01:52:85 (1,1) - Remove new combo.
02:02:66 (4) - New combo.
Normal:
00:19:27 (1) - Remove new combo.
Easy:
02:02:66 (3) - New combo.
Starred.