I build 60 levels for “Shift 2 – iPhone” during my internship at Fishing Cactus. This is a mobile version of the acclaimed puzzle title originally made by Armor Games.
The above video is a game review by AppSpy.com showing samples of the levels I made.
I developed a "level sorter" in order to balance game progression. Just copy/paste your XML and the sorter create draggable thumbnails of the levels.