Quite an enjoyable game. Simple in style and concept. Levels are reasonable. I would like to see a little more clarity/contrast in colors. The Blue on Blue was a bit difficult to see, and the trails took basically trail and error to figure out what they did. Your play testers should have probably advised removal of a few of the blander/annoying levels. Game Length was great. Love the Single screen aspect and the different play concepts your threw in on the later levels.
Overall a short and enjoyable game.