Great submission! I liked the shooter-style of this game, but it took me a minute to get into the groove of the "circuit" doing damage. I think it's a unique mechanic and would have some interesting uses if you want to continue to expand this game. Like what if the + and - were strategically laid out like an obstacle course or land mines. Overall, enjoyable game and I wish you luck in the jam!
If you want to try out a fellow "circuit" game, you can check out my submission. :)