Lol, this reminded me of those metal hoop contraptions in real life which buzz if you build a circuit. Well done!
My only feedback would be making the game self explanatory (as opposed to reading the description)... an example would be if the magic circle would be pulsing until you move the mouse down it would tell me i have to interact with it and not the paw / card. That being said once i read it, it was clear.. so for a jam .. well done!