One thing I could recommend is working on your block palette and making smoother shapes, your circles that surround the entire thing are extremely harsh because you added stairs to every block, I recommend you stay away from that and try to make smoother looking shapes. As for your block palette it seems you went a little crazy and started using all the blocks, in some cases it looks amazing to do that, but in your case in such a small area black,brown,green,red,purple,pink,white,blue,etc sort of kills it. Once again with the shapes, with your dragon you made work on trying to make smoother edges so it doesn't look so harsh. These are my suggestions :) It's an OK map.
This is all criticism to help you get better.:)