Second Chance

When the front reaches the edge, the run is not over yet: you are offered a rewind, once per run.

It takes the board back five turns, with the walls you had spent by then. It does not hand you a fresh level — the whole appeal is the board you were already working, and the placement you would now make differently.

Free players watch a short video for it. Premium players are given it, offline and instantly. The rule is the same either way: paying changes the cost, not the game.

If there is no ad available to fund it, a free player is not offered the rewind at all — rather than shown a button that does nothing.