A gaming machine is described herein. The gaming machine includes a game control unit programmed to display a game screen including a primary game area a plurality of primary game reels and a bonus feature event area including a plurality of bonus prize cells. Each bonus prize cell is configured to display a randomly selected bonus prize, and is operable as one of an active bonus prize cell and an inactive bonus prize cell. Each bonus prize cell is associated with a wager amount value. The game control unit initiates an instance of the game by receiving a wager being placed on the game by the player, selecting bonus prize cells having associated wager amount values equal to or less than the wager amount of the received wager, and operating the selected bonus prize cells as active bonus prize cells.