This game is addictive.
Sometimes I came up with a solution, and while executing it, I accidentally closed the loop. I found the difficulty curve to be good, although I haven't gotten far yet. After finishing a 3x4 level, it threw me back to level 2. Was that a bug or was I too bad and took too many steps XD?
I also like the aesthetics. Crazy that you finished this in 24 hours.