admittedly i was inactive for 2 months due to being in Michigan.
and you found a bajillion amazing fun things to do? :D
I think your coloring looks good when it's a single character on a blank/simple background, but when you have a complex background it starts to get confusing.. the foreground is not really differentiated from the background, and there is kind of a cluttered feeling.. so maybe in your colors, you could play with contrast, like having greater contrast in the foreground, while the backgrounds sort of fade in contrast.