The wild symbol replaces all symbols and the highest winning combination according to the symbol payout settings.
The Free Spin feature is entered when 7 or more Scatter symbols appear during the Main Game, and if 3 or more Scatter symbols appear during Free Spin, the number of free spins is added according to the number of Scatter symbols that appear.
When acquiring Free Spin, a frame is displayed at the location of the Scatter symbol that appears, and when a Scatter symbol appears in the same location, it is upgraded up to the next level. Up to 3 levels.
At the end of the Free Spin, the winning multiplier appears in the frame position depending on the type of frame.