I'll contribute. You've cluttered your rocks too much, therefore diminishing the effect they're meant to have. Keep them rare and they'll give out a more powerful effect on your level. Apply this for both water and dirt stones.

Your grass doesn't work either, it's just random patches and that doesn't really make any sense. It's the same case with your chest, the placement of it is just silly.

Other then that, I enjoy your flare of creativity evident in the level. Well done.