These are purely suggestions. I like symmetry a lot but you might not, so you do not have to change those if you do not wish. It just looks better IMO.
[Easy]
00:19:892 (1) - Vertical flip and align with 00:18:236 (1)?
00:21:547 (1,2,1) - Take this and delete. Then take 00:18:236 (1,2,1), copy and paste, and do a vertical+horizontal flip
00:24:857 (1,2,1,2) - Make this symmetrical somehow?
00:28:167 (1,2,3,4) - Unstack
00:48:030 (1,2,1,2) - Make this symmetrical?
00:51:340 (1,2) - Move up 2 level 3 grids up
01:11:202 (1,1) - End on the white tick before.
[Normal]
00:24:857 (1,2,3,1,2,3) - Make this symmetrical?
00:39:340 (4,1,2) - 4 grids to the right
01:11:202 (1,1) - End on the white tick before.
[Hard]
00:18:236 (1,2,3,4,5,6) - Symmetrical?
00:25:478 (3,4,5,6,7) - Move 2 grids right
00:25:478 (3,4) - 1 grid right
[AL2e's DIF]
It's okay.
[Redesign]
00:10:787 (7) - 1 grid to left
00:19:477 (7) - ^
Nice map star~
[Easy]
00:19:892 (1) - Vertical flip and align with 00:18:236 (1)?
00:21:547 (1,2,1) - Take this and delete. Then take 00:18:236 (1,2,1), copy and paste, and do a vertical+horizontal flip
00:24:857 (1,2,1,2) - Make this symmetrical somehow?
00:28:167 (1,2,3,4) - Unstack
00:48:030 (1,2,1,2) - Make this symmetrical?
00:51:340 (1,2) - Move up 2 level 3 grids up
01:11:202 (1,1) - End on the white tick before.
[Normal]
00:24:857 (1,2,3,1,2,3) - Make this symmetrical?
00:39:340 (4,1,2) - 4 grids to the right
01:11:202 (1,1) - End on the white tick before.
[Hard]
00:18:236 (1,2,3,4,5,6) - Symmetrical?
00:25:478 (3,4,5,6,7) - Move 2 grids right
00:25:478 (3,4) - 1 grid right
[AL2e's DIF]
It's okay.
[Redesign]
00:10:787 (7) - 1 grid to left
00:19:477 (7) - ^
Nice map star~