Easy
good
Normal: combos are too short. Maybe you like colourful beatmaps, but I think a new combo should begin at where a new music passage start.So you should try to reduce them.
00:51:458 (1,2) - Not symmetrical actually. 00:52:870 (2) - place it at x=204,y=64
02:30:282 (1) - I don't think there should be a new combo.
02:35:929 (1) - No new combo too.
02:51:458 (1) - No new combo.
02:56:752 (1) - No new combo. A different colour will make player think he can take a little break here and miss it. It's belongs to the former music passage.
03:04:164 (1) - No new combo.
03:06:988 (1) - No new combo.
Hard
02:57:105 (1) - x=172,y=60
02:57:282 (2) - x=248,y=108
02:57:458 (3) - x=324,y=60
02:57:635 (4) - x=400,y=108
Insane
Nice!
I love this map as well as the anime. Hope your beatmap will be ranked soon:)