Very solid puzzler. I think the core mechanic is very sound and easy to understand. The puzzles are not simple but not unnecessarily convoluted either. As silly as it sounds, my favorite part was the ability to cut out parts of the circuit that were no good, it made me feel clever and like I was making my own solution (obviously I was not but I think that is still a very good feeling to have in a puzzle game like this, so nice job!)
Feedback wise, I think perhaps making the areas of the puzzle that fail the circuit test flash red or something might not be a bad idea in a post jam version, it would definitely help with readability.
Thanks for the good puzzles, I enjoyed all of them.