This is much better, but I think your mockup would benefit a lot from a more unified, connected palette. I like your shapes, rendering and the scale of objects, but the way you varied the colors from one piece to another makes me feel like you haven't tried to use the colors to give a specific mood to your game, which would be interesting if you want to improve it. However, I like the fact that you made closer objects more saturated, I just think that the shadows are varying their hues in too many different directions without reason. Was reserving outlines only to active/moving sprites a councious decision? You have many different outlining rules in the same piece, I didn't liked it so much, but that is just personal preference, it is a perfectly valid way to do it.