Kind of late, but meh. i'm busy.
Cutoff. Actually, i'm not doing the ground cutoff fixing. Since it can be fixed with some small modification on the level design, or a new tile on the map 16. It is not too hard to make though.
Hmmm.... Is it possible to make this blue? it's looking kind of weird right now.
-Same as first Screenshot.
-Bad on/off tile.
Add a corner tile map 16 edit here, so mario can't go under the sand.
Cutoff, probably will make a simple edit to fix it. So don't worry.
Try to vary the vines a bit.
-I don't like this kind of decoration. It may be just me though.
I don't know why it happen here.
Try to make it one tile higher, so the jump can be easier.
Those cement blocks looks weird there.
-Same as the first screenshot.
-Weird Cement block.
I don't know why you haven't replaced the tiles in this area. Just pointing out.
-This jump is a bit annoying.
-Cutoff. i'll make a fix tile for it.
I thought there was something down here. I was wrong, try to add some coins or some indication that here's nothing there. It may be just me though.
Those Gradients need a bit more work.
That is all. It's a good level, and i found it fun. Nice work with it. But i wish you use the 2nd dirt texture more often, to add more variety.