Turned up the lighting, especially on level 3.

Shopping cart was an interesting buildable idea.

Stronger color application in painterly style. Threw in some more brainstorm sketches at the bottom.

Added rust to cart, fixed some of the quality. Altered saturation so level 3 would be the most saturated. Fixed up some of the muddier colors.

Adjusted level 2's size so level 3's would be more outstanding.

(Woops, forgot to add title bar at the bottom.)Fixed those dang isometric wheels! ..Or at least I hope I did.