These screenshots don't look bad, but as far I can see they look very similar to others levels with those tilesets, and according to the given images they appear quite generic. The Carrotus and Castle levels have tile bugs in the walls. Also, I suggest that you avoid using layer 4 tiles that are normally masked on layer 5, as it can become very confusing and frustrating at times. Finally, the Castle screenshot is the only screen that seems to show any form of preivew on the gameplay; the others look fairly empty.