Hey it's nice seeing you being so dedicated lately. There's a lot of nice things going on. Really dig the art crusade entry and agree with what Jakers mentioned about the sky. Just to add to it, just remember that even the sky and ground are elements that adds to the composition so use them as such to guide the eye and help the composition.
I like the variety of the environments you have been doing but I feel in overall color wise, some look too saturated. You could play more with muted colors in the next ones and save the saturated for your focal points. Of course, mainly the use of very saturated colors all around creates more of a cartoonish look, if that has been your intent so far.
And the mouse turned out nice too. Keep it up!