This reminds me of Adventure Time in that it is a mish-mash of various genres that you don’t ordinarily see together. To complicate matters, characters like the denizens of the Robot Kingdom are depicted with a strange (but refreshing style) that is more reminiscent of Perry Bible Fellowship comics than the more mainstream books I’ve read.
The language is modern and informal, which augments the novelty of the work. It feels to me like lots of old themes and tropes repackaged into something bright and fresh and new.