Known limits, unknown bonus timing
Tumble refills the grid after every win, and bonus chests can land on any spin. No figure here or in the game says how often the Free Spins round comes. Its timing is random, so one session may trigger it early, late or not at all. The RTP does not change that. Whatever the RTP, the result of one session stays random.
Five or more matching symbols joined horizontally or vertically form a winning cluster on the 7x7 grid. Which of the two RTP versions this game runs is shown only in the game rules, so read them before you play. The table on this page sets both versions side by side.
Tumble chains can stack several wins into one spin, and the top prize is capped at x5,000 your bet. That ceiling is reached very rarely, so nobody can count on it during any single session, however long the session runs.