There's almost no blending with the surrounding tiles you were given. If there was more in the way of incorperation with surrounding work, you might be able to get away with the stylistic skull with a strange green top-hat, but it's almost completely cut off from the surrounding 3 tiles given.

You've also got mostly black to give to the artist underneath you, which limits their work quite a bit.

Stick to trying to use most of everything you are given from surrounding tiles, and try to give yet-to-be-completed tilers something to work with.

Essobie