Great game! There was a lot more depth to the maze-building strategies than I originally realized.
I was impressed by how consistently the hints told me exactly what I was missing, and by how well-calibrated the target scores were.
The only thing I feel like the game is missing is a way to quick-restart a level. Sometimes I knew from the first second that I had messed up, but I had to wait for the scientist to get to the finish before I could retry.