In addition to what Tricxta pointed out, the level seems very crowded. It's almost as if, in order to detail the level, you just randomly placed objects. I see many small tile-errors. I'm not going to point them out; if you look for them, you
should find them.
I'll list out a few things that (in my opinion) could improve the level...
- Instead of having the shrubs scattered everywhere, group them, and don't use so many.
- The wooden pillar transition between the water and grass looks unnatural, and seems to break the perspective. You should try something else.
- I think you should remove most of the boulders, however, I understand if it is meant to be a rocky area I guess.
- The way the waterfall is at the moment makes little sense. It begins above where the cliff starts. Move the beginning of it down, or create your own solution.