Congrats on your first game jam!! Your submission is really cool. I enjoyed the feedback of seeing the electricity moving through the wires and how you could place each part. I would have loved to be able to build wires by clicking on the start and finish to connect two pieces. Also, once I got the loop working for the first level, I got a pop up with my efficiency and cost, and while both were within the range specified, I couldn't tell if I "won" or not. For your next game jam (I hope this will be the first of many!), I recommend adding elements that give the player clear feedback on win/lose. This can be as simple as a green checkmark or something. Since your game mechanic is essentially connecting components, in this case you could even start out with a super super simple level where the components are there and you only connect one to the other. It would give the player an intro to how things are scored and how to use the mechanic you design. Then jump in to making their own design by placing components.
All in all, a very impressive first jam submission. If you want to check out a fellow "Circuit" game submission, here's ours: https://itch.io/jam/gmtk-2025/rate/3773979