Good puzzle game. Glad it gives you the ability to undo or restart (immediately)!
I liked the simple visuals and the music sound/effects made for a very cohese experience. My only gripe with the music is this sort of static sound that keeps in the background, seemed a bit annoying after a while. But that's probably just me.
I thought the difficulty was a tad overtuned on the initial levels, how many levels does it take for the other Timmys to appear? I didn't get to see 'em before giving up the challenge.
Overall a solid puzzle, especially for people who enjoy challenges.