Not enough balance.
Choose how many bombs are hidden on the board, place a stake and reveal tiles. Each safe tile increases the available multiplier. Collect before hitting a bomb to add the return to your balance.
The bomb count is set before a new round and cannot change while that round is active. More bombs leave fewer safe tiles. Once the round ends, review the result and choose the settings for the next board.
No. The tile appearance does not reveal the hidden result. Published fairness information lets you inspect a completed round, not identify safe tiles in advance.
The round ends and its stake is lost. You can change the bomb count before starting another round. Earlier safe picks are not paid unless you collected first.