Maybe if 你 followed the Adventure Time art style, it'd help. I took 1 小时 drawinh Marshal Lee, Marciline's oposite and nkw I can draw in Adventure Time for all my drawings. But it's really good 由 itself.
Please dont take this the wrong way, Yes it looks good, but it needs touch ups, the hands are a bit disproportional to the arms and Id make the hair smoother, but other than that, its good. :)