When Will bought the bar from the vending machine, the first two numbers were 11. This should have made the same sound when pressed. Instead, it made two different sounds, and it appeared his fingers moved not to touch 1 twice.
When Will and Jimmy are playing chess, we see one player capture the other player's queen. A few moments later, the player who lost his queen still has it. From the board position, one can tell the game is still in the opening stages, and so an endgame pawn-promotion-to-queen (to get another queen) is highly unlikely. And since it was a serious game with a clock, it is also highly unlikely that one player would allow his opponent to take back his move, saving his queen.