The sand detail is terrible he needs to use all the different sand types. Plus the rocks (but dont go overboard on rocks) the water looks like crap its nothing but a bunch of lines of water as opposed to puddles or streams or what not. Basically his entire elvel is nothing but lines of different tiles. The grass on grass goes in lines which is bad. The house tiling isnt any good it looks sloppy and not thought out, but then again that can be said about most of the level. Basically he needs to stop think about how he wants the level to look and then make it. As it is now it looks to me like he's just trying to fill up space with the grass/grass, grass/water, and grass/sand tiles. All in all I wouldn't say its omg terrible quit now! With work and practice the person who made it could be a fairly decent level maker. It has potential.
Oh yea and the grass. Its to square he needs to use the grass tiles near the lower left of tile set on edges to give it a rounder and more natural look.