Press Begin to start movement. Press Stop to reset the round, then press Space or tap Lock to place the moving row.

Only blocks directly above the previous row survive. Missing the stack ends the round.

Reach the minor prize to cash out or continue. Reach the top row to win the major prize.

Standard rewards are +$10 minor, +$50 major, and -$1 on a miss. Betting mode replaces those rewards with the selected wager.