40 Glossy Hot Coin Boost

Symbol Upgrade is a powerful feature that progressively converts low-value symbols on the reels into higher-value ones as the game proceeds. The core of this feature is not just a one-time symbol change, but a 'growth' structure where lower-tier symbols are permanently removed from the reels and replaced by higher-tier ones. This drastically increases the average expected payout of the reels towards the end of the round.

Full Screen Bonus is a special payout rule that awards an additional bonus (usually a multiplier) on top of the standard prize at the visually most satisfying moment when all positions on the reels are filled with a single identical symbol. The core of this feature is that it is distinguished from a regular high-payout win, as it is an 'achievement-based reward' given for accomplishing the special condition of 'filling the entire screen'.