Before the first spin on Sugar Rush 1000
Every spin on the 7x7 grid tumbles new symbols into the empty cells, and three or more Scatter symbols anywhere on the grid open the free spins. How often the bonus round comes is not known in advance. The result of one session is random, whatever the RTP.
The reels pay out under one RTP version at a time, and that version is shown only in the game rules. Check the game rules to see which version applies to the session you are playing. The gap between versions is small, and a single session cannot make it visible.
Five or more connected symbols of one kind form a cluster that pays on the reels. The maximum win of Sugar Rush 1000 is x25,000 the bet, a ceiling that is reached very rarely. Treat that figure as a limit on the payout, not as a target.