General:
Tick rate 2 fits this song better than 1 for most of the difficulties IMO.
Insane:
OD +1 so the streams are actually difficult. HP Drain -1 because even then it's still a very easy map, and HP Drain 7 fits a very easy Insane like this one better than 8.
00:12:724 (3) - This elbow slider is done very poorly. I recommend looking at RJ's thread in General Discussion to see how to make good elbow sliders.
00:30:128 (1) - 1. Why is there a jump on this somewhat random offbeat? It just doesn't feel good when playing. 2. This note shouldn't have a New Combo. The *next* note should be the one with the New Combo.
00:42:724 (2) - Its head is mostly overlapped by (6). It might still be rankable, but is
nonetheless.
01:37:915 (4) - It goes directly back on itself in the middle so it's unrankable.
Hard:
00:17:991 (1,2,3) - I would make it so that (3) isn't on (1)'s slider end. That pattern is just a bit too confusing for a Hard IMO.
00:23:716 (2,3,4,5) - You have 2 stacked on 4, which is a slider, but go to 3 in the middle of the stack. This pattern really is too confusing for a Hard, since the player's natural assumption is that (4) is actually (3) (Remember, you can't see the numbers in a stack!) and thus they won't look for 3, will break their combo, and will rage for a bit. In Insanes it's OK, but in Hards? Nah.
00:25:319 (1,2) - The hitburst from (1) makes (2) look a bit broken and not pretty due to its position. I would just move (1) completely off of (2).
00:55:777 (1,2,3,4) - The middle of this pattern isn't pretty. (1)'s hitburst covers over (4) and the entire pattern as a whole feels cramped.
01:19:136 (1,2,3) - Again, can you please move (1) off of (3)'s slider end?
01:24:861 (3) - This is completely covered by an earlier slider. In other words, it's pretty much hidden. While experienced players like me can read it easily, the players who will actually be playing Hard over Insane often will have troubles with it.
01:50:739 (7,1) - Yeah... I just don't like this overlap at all, sorry. It's just not pretty after (7) is hit due to the positioning of it.
01:54:861 (2) - This is mostly hidden for a bit by (4) from earlier. I think it's rankable in this case though but don't take my word on it.
Normal:
00:27:609 (4,1) - I don't like this overlap. The hitburst over (1) on such a low AR is just not that pretty to some people.
00:30:357 - There should be something here. It's like the most important downbeat in the entire song. :X
00:34:938 (2,3) - The slight overlap with (3) makes it painfully obvious that (2)'s red point isn't centered properly. To fix, simply move (2)'s red sliderpoint one grid to the right.
00:46:846 (1,2,3) - Here, either all the notes should be touching each other or none of them should be touching each other. They're all 1/2 apart, so they should all have the same spacing on a Normal.
01:11:121 (2) - A hitburst from earlier covers it. This is a bit too difficult for a Normal IMO.
01:21:197 (1,2) - Can you move their ends slightly apart from each other? I do not like slider ends overlapping each other exactly like this on a Normal.
Easy:
The sliders are fast in this difficulty, so consider using tick rate 2 so that all of your 1.5-beat sliders don't have uneven ticks. It won't clash with your rhythm, either; tick rates are subtle and mainly just give your sliders a rhythmic "texture".
00:50:052 (1) - This looks like a blob on some slider types and would probably freak some newbies out. I suggest making it not as cramped.
Anyways, no offense, but like Louis said, this needs a bit more work. If you get some more mods I wouldn't mind rechecking it.