Normal: Wayyyy too short. I'm sorry to say 51 seconds is not at all enough play time. Also, for all map, change the colors, it seems a little lazy (and we don't want people to think that when you're really not) when you keep the default colors. Try to make it the same colors of the video or look good with it :O
00:36:324 (end of green repeating slider) I think you should put a whistle sound here to match with the "Hai!" in the background. I don't think it's really necessary, but adding some variety in sound would be nice. I can see you did that in the hard mode.
Hard:
00:30:070 (dark orange 5, 6, 7, and light orange 1, 2, 3) I think here you should change those to a whistle or possibly claps to emphasize the loud, independent beat (I don't know if that's a good way to describe it, lol
) But if there's a loud beat anywhere you should definitely emphasize it with sound effects.
00:53:328 (light orange 1, 2, 3) Just like above, put emphasis on these kinds of beats, I think cymbal fits here particularly well.
00:54:223 (green slider) This is a loud whistle-like sound, so really bring it out by adding the whistle effect here.
1:03:468 (whole light orange combo) Same as above - add clap or cymbal here.
The good news is, it's an awesome map
The bad news is, I can only give you 1 star, although I'd like to give you atleast 5 :[ Good luck and hope this helped! ^^