Looks nice, but the ? on the blocks look a little funky and the background isn't too fitting. Good work though, this is exactly what I need for a level in my project.
Looks great but that ? sign looks pretty weird though. I personally think you should change the inner grass tile colour to a more intense tone of brown but it's still a good effort.
Attempt successful in my opinion. It would do well with a sort of biscuit/food-themed level too like the one in 3D Land. The cross-hatching seems very "biscuity" and a yellow recolour, would double well as a waffle tileset. I can see myself using this.