00:21:214 - new combo
00:21:896 - remove new combo
00:31:441 - switch the positions of the slider (5) and note (1) that goes after. Then remove the new combo from the note and add it to the slider. It should look like this:
00:37:578 - remove new combo from the slider and add new combo to the note at 00:38:941. Then move (1) (2) (3) (1) one white tick later. It should look like this:
00:54:623 - remove new combo and make it bigger so it lasts one white tick longer and then remove (6) and add new combo to (7). Something like this:
00:59:396 - remove new combo
01:02:123 - add new combo
01:05:532 - make this spinner shorter so it lasts to 01:07:237. Then move (1) (2) (3) (4) earlier and add a new note (5) at 01:11:328. It should look like this:
Now about the spacing, Ill give you examples of what is wrong in the easy. You will then have to find similar situations in the normal, hard and insane yourself, and fix them too.
At the very start, you can see that the distance between the first slider (1) and note (2) is smaller then the distance between (2) and (3).If you don't use distance snap then you have to pay attention to such things yourself. You could have placed it like this:
That way, it's more even, less confusing and looks nicer.
00:13:032 - similarly, (9) is too far down.
This whole part from 00:17:123 to 00:23:941. The distance changes almost after every note.
00:29:396 - these three notes are also weirdly placed.
Similarly here 00:44:055
If you wanted that to be a jump, then make it more pronounced like this:
Otherwise it will look more like a mistake then a jump.
00:52:578 - here (2) and (3) should be moved up.
This part from 00:56:668 to 01:04:850 - So many inconsistencies.
Those were only some examples. There were more mistakes like that, but you will have to find them yourself, and they also appear in all difficulties. Now, such differences in spacing can be ok when you do them right, but they have to make sense and be more pronounced, if it's only a small difference it is more likely it will look like a mistake then intended.