A method of operating a gaming system, said method comprising:
- (a) causing at least one display device to display, in association with a play of a first game, one of a plurality of different symbols at each of a plurality of symbol display positions, wherein the plurality of symbol display positions form at least three columns and at least three rows including a first row, a second row positioned adjacent to the first row and a third row positioned adjacent to the second row,
- (b) causing at least one processor to execute a plurality of instructions to determine if any of the displayed symbols form any winning symbol combinations,
- (c) if any of the displayed symbols form at least one winning symbol combination, causing the at least one display device to display one of a plurality of awards for each displayed winning symbol combination, wherein a credit balance is increasable based on the displayed award for each displayed winning symbol combination, said credit balance being increasable if a physical item associated with a monetary value is received via an acceptor, and said credit balance being decreasable if a cashout input is received via a cashout device,
- (d) for each displayed symbol, causing the at least one processor to execute the plurality of instructions to determine whether said displayed symbol qualifies to be removed,
- (e) for each displayed symbol that qualifies to be removed, causing the at least one processor to execute the plurality of instructions to remove said symbol,
- (f) for each of any symbols removed from the first row of the symbol display positions, causing the at least one processor to execute the plurality of instructions to reposition at least one of the remaining displayed symbols to at least another one of the symbol display positions to create at least one empty symbol display position,
- (g) for each of any symbols removed from the second row of the symbol display positions, causing the at least one processor to execute the plurality of instructions to reposition at least one of the remaining displayed symbols to at least another one of the symbol display positions to create at least one empty symbol display position,
- (h) if any empty symbol display positions are created:
- (i) for each created empty symbol display position, causing the at least one display device to display one of the plurality of different symbols, and
- (ii) repeating (b) to (h) at least once,
- (i) if a second game upgrade event occurs, causing the at least one processor to execute the plurality of instructions to upgrade at least one attribute of a second game,
- (j) if a second game triggering event occurs and the second game upgrade event occurred, causing the at least one display device to display a first play of the second game, wherein the first play of the second game is associated with any upgraded attribute of the second game, and
- (k) if the second game triggering event occurs and the second game upgrade event did not occur, causing the at least one display device to display a second play of the second game, wherein the second play of the second game is not associated with any upgraded attributes of the second game.