A gaming system comprises game-logic circuitry and a display device configured to display an active array of symbol positions. The game-logic circuitry establishes award levels having respective awards and respective array sizes and establishes a predefined path defining progression through the award levels. The display device selectively populates the active array with symbols through one or more game cycle outcomes, updates, in response to detecting a branching condition within the game cycle outcomes, the predefined path to a modified path such that progression from the first award level is altered from a second award level to a third award level, and, in response to progressing from the first award level to the third award level based on the modified path: (i) modifies the active array to the array size of the third award level, and (ii) repeats the selective population for one or more additional game cycle outcomes.