So here is the representation of a woofer, with a bug (8 sliders and a dragable block, and some motor to act as a spring and prevent it from leaving completely), I tried as much as possible to stabilize it, push it a little the membrane back to activate it.
@jana @Denis Nazin Here is the tic-tac-toe mechanism (it got taken down from the levels section by @cimarronline lol) Spoiler: Card Spoiler: Video demo Thank you @MekoramB for providing X-letter block