Picture a wall made of interlocking blocks that shift when a monster steps on them—each block has a hidden lever that flips a section of the wall over, blocking the path. The key is a rotating puzzle ring: when the monster walks over the ring, it turns a gear that unlocks a secret chute behind the wall, dropping the monster into a pit of foam “mud.” If the monster tries to rush, the wall’s outer layer slides sideways, forcing it to choose a longer route that opens the trap door. Add a light‑sensing sensor that lights up a warning tile when the monster gets too close, letting you time the wall’s final move. It’s a fun mix of building and strategy that keeps the monsters guessing and you on your toes!