Major issues in the map : change them.
Minor issue in the map : you don't have to follow them exactly, but if you don't, explain why.
Suggestions : those are personal opinions, feel free to follow them or not.
If there's one red line in the whole mod post, or three blue lines, I won't star the map.
Easy:
00:18:903 (2) - Too close to previous object (although with this time difference it doesn't matter much).
00:20:315 (3) - ^
00:21:727 (4) - ^
00:22:080 (4,5,6,7) - Those objects are too far apart.
00:32:315 (4) - Move this one grid (lvl 3) left (you'll have to move the rest accordingly).
00:33:727 (6) - ^
00:35:668 (2) - Move this one grid up.
00:43:433 (5) - Remove this repeat slider.
00:44:315 (6,7,8,9) - Turn this into a repeat slider or two sliders.
00:52:433 (3,4) - Turn those into one slider.
00:53:845 (6,7) - ^
00:58:080 (3,4) - ^
01:01:962 (10) - Move this one grid (lvl 3) left.
01:05:845 (2,5) - You shouldn't place 1/4 repeat sliders in a Easy diff.
01:10:962 (1) - I'd make this spinner end one beat earlier.
01:12:550 (1,2,3,4,5) - These objects are too far apart.
01:17:139 (10) - This slider is overlapped by the previous one (and is ugly), change it (not to mention it is not spaced correctly).
01:19:962 (1,2,3,4,5,6,7,8) - This is too hard for an Easy map, try changing it to simple circles or sliders placed on big white ticks.
Normal:
00:07:791 (4) - Too far from previous object.
00:09:026 (1) - This is WAY too far from previous object.
00:10:615 (4) - Too far from previous object.
00:11:144 (5) - Too close to previous object.
00:11:849 (1) - Way too far from previous object.
00:21:379 (2) - At this point you changed the distance snapping, you shouldn't.
Before my post is 100 lines of "too far/close from", I advice you to choose a distance snapping, then re-space all the map using it.
00:55:613 (5,6) - Don't overlap sliders.
01:21:554 (6,7) - ^
Use other hitsounds than Clap, the map gets noisy.
Hard:
00:51:374 (1,2,3,4,5,6,7,1,2,3,4,5,6) - Avoid this kind of overlapping.
00:57:021 (1,2,3,4,5,6,7,1,2,3,4,5,6,7,8,9) - ^
I like the end.
Insane:
I warned I might not mod Insane diffs due to not being sure of what I say, I'll apply that here.