I really liked the concept and the visuals felt really polished. I think I can understand the desire to have the backtracking to clear the players head of the current puzzle and similarly the timer to stop them from staring at it and solving in one move, but I felt both were a bit distracting. The timer was for me way too short, and so there was no time to make an educated guess in the later levels and I just was guessing. I think the later puzzles are complicated enough that even sitting and staring at the board people will mess up. Great job though on your first jam game!