Here for M4M (from your queue)
[General]
Too much unused mp3 at the end is unrankable. Drain time should be at least 80% of the total time.
Easy and Normal are very close together in terms of star difficulty. If you can try for a smoother difficulty spread. I suggest reducing the difficulty of Easy further, by replacing some of the 1/1 and higher rhythms with 2/1 and longer rhythms.
[Easy]
00:18:334 (1,2) - Blanket can be improved. Look from 00:18:939
00:22:205 (5) - NC
00:28:979 (2,1) - Doesn't flow well. (1) curves too much for smooth flow.
00:44:463 (4) - Missing a clap here?
00:51:721 (3) - 1/2 notes are still generally not recommended in Easy, but it's up to you if you want to keep it.
00:57:527 (1) - There is a noticeable kink in the slider. Ignore if that's intended, but otherwise try to make it more subtle by tweaking the points a little.
00:58:495 (2) - A simple 3 point slider here will do. No need to mess up the flow that much.
01:00:431 (1,1) - Recovery time might not be enough here in an Easy. Newer players need more time to recover from wild spinning. I suggest deleting 01:03:334 (1,2) and adding a single note at 01:04:302 instead, to literally let the new player "catch my breath"
.
01:08:173 (3) - Extend by 1 beat. There's such a strong sound on 01:09:624 and it's a pity not to map it.
01:10:108 (1) - A simple wave slider without kinks is good enough.
01:36:721 (2) - ^
01:43:011 (1) - Curve can be more noticeable
01:56:560 (1) - Shape looks strange. Just use a simple wave slider here.
01:59:463 (1) - Again avoid 1/2 notes; stick to the white ticks.
02:01:398 (3,4) - Doesn't flow well. Either move (4) up, or move the tail of (3) down.
02:12:044 (1,3) - Try not to have stacked notes in easier maps as it might be confusing for a new player to have an approach circle appearing out from nowhere
Try to use the longer 2/1 notes and sliders, to make the map easier. Avoid going into red ticks, notes in Easy should almost entirely on white ticks, except for the occasional slider end.
[Normal]
00:23:662 (4,5) - Blanket can be better. Look from 00:24:266
00:28:984 - Not having a hitsound here is weird. How about something like this, so the tick is mapped?
00:31:887 (4) - NC
00:36:726 (6) - Make the kink land on the downbeat 00:37:210
00:43:742 (2) - The repeat should be 1 tick earlier, on the red tick. How about this?
01:00:436 (1,1) - If I remember correctly, the rough guideline for recovery in a Normal is about 2 beats. Maybe replace 01:02:855 (1) with a single note on 01:03:097
01:04:549 (4) - NC? idk
01:42:290 - Add note?
[Hard]
00:17:371 (5,1) - Ideally, in a bow/arrow slider the arrow (1) should be going directly through the center of the bow (5)
00:29:468 - You should map the downbeat; it's a fairly strong sound.
00:30:436 (3,4) - It would be good if you can map to the drums here. Maybe you could use the drum sampleset?
00:38:662 (3,5) - Also in a bow/arrow slider the bow should be blanketing the arrow for it to look good.
00:46:403 (1) - Replace with a spinner starting on 00:45:073 and ending on 00:46:403
01:09:871 - You should map this tick
01:17:855 (5) - NC here
01:36:968 (3,4) - Fix the blanket here
01:42:533 (8,1) - ^ (can be improved)
01:56:565 (3) - Bounce on the white tick 01:57:049
02:11:807 - Map this tick too
02:17:129 - ^
[Thoughts]
Not too sure about this, but I think Normal has more long (long meaning 2 beats or more in length) sliders than Easy.
Flow and stuff is mostly there.
You should work on polishing and perfecting your slider shapes to make them look the best they can. Sometimes sliders are done in a hurry, and their quality is often overlooked.
Good luck!