I never like a level with a lot of flowers in it. The level seems to be of decent quality grass wise.. but it could use a lot of work. Try adding some dirt stuff or anything to make it look more orignal from its current state.
water detail
Don't use that deep stuff in such a short amount of water that you have there.
1.) Tile errors will become a regular thing when you have a short amount of space to get it fixed.
2.) It doesn't look too good like that.
Grass to water
I don't like those tiles being used in this level. you should use some shore tiles instead, it'll look a lot better.
Cliff Tiles
Needs some different variations... doesn't look good like that too much.
Overall
Looks better then a lot of people can do... but it can use a lot of things to help it out. Good try!