[draygin]

I've highlited the tile errors in your levels in red.

Red:

The two bottom left the one tile error is obvious. Both spots in the lower left you're missing a tile. If you look at the tiles in the tileset where these are grouped together you'll see the problem. Same problem in the lower right.

The cliff up there the top part of the tiles are wrong. I would finda way to adjust them... even if it means fliping the top two of the cliff tiles around.

Blue... mostly it's just pointing out how your level is to pointy. (No pun intended.) Some pointed areas is ok but going overboard makes it look unnatural and detracts from the level.

Move the mushrooms so that they're in clumps and not spread through out your level. They look nice but when playing on a level they tend to blend in and people will run into them which is annoying when playing. (Clumping together makes it more noticable.)

Then as Crono suggested use less dirt for your level. It's ok to have some open green areas with no detail. The amount of dirt you're using really takes away from the level.

All in all with some minor effort it will end up being a great level.