Underdog's Save Sweet Polly Game

Object is to save Sweet Polly by moving into the blockhouse on Barsinister Island where Simon Barsinister has hidden her. Each player has a designated start space on the board. On each turn, the player spins the spinner and moves their Underdog piece forward or backward along the path (one or the other per turn). When landing on a "Turn Blockhouse" space, the blockhouse in the middle of the board is moved one turn. There are four paths leading to the blockhouse but only one side has a yellow door that allows entrance. This door moves when the blockhouse turns. First player to get into the yellow door and enter the blockhouse saves Sweet Polly and wins the game. Exact number not required.