You are the architect. Place rungs (one per row, up to your mode's limit — 5 on Easy, 6 on Normal, 7 on Hard, 8 on Expert) to steer the token down the ladder to the biggest vault you can reach — the ladder gets taller by mode: 10 steps on Easy, 12 on Normal, 14 on Hard, 16 on Expert — payout is your bet × the vault you land on. Lane 1 is always the 0x BUST vault.
Three hidden hazards are committed by the seed before you lock: 3 ghost rungs on rows you left empty, which slide the token like your own; bust tiles, which end the run at 0x the moment the token steps on one; and bust rungs — trap rungs across a gap that catch the token as it tries to cross. Hazards are checked on arrival at each row, before that row's rung move.
Chicken Step: with Step mode on, a manual drop pauses after every row — continue down, or cash out at the step multiplier (growthrows: Easy ×1.08, Normal ×1.12, Hard ×1.18, Expert ×1.25 per row). There is no cash out after the final row: clear it and the run settles on the bottom vault. Every run is provably fair — the server seed's SHA-256 hash is committed under the board before you bet, and any history row can be re-verified from its revealed seeds.