1. A gaming system comprising: a credit input mechanism configured for player interaction to receive a credit input representing a monetary value for establishing a credit balance; hardware meters configured to monitor the credit input having been provided by the credit input mechanism; a player interface comprising a display on which a plurality of selectable symbol display positions are displayed to a player, the player interface configured to, in accord with said hardware meters having monitored the credit input having been provided by the credit input mechanism, allow a player to select a number of intersectable windows defining subsets of the symbol display positions; and a game controller configured to select symbols for display at the symbol display positions, to select a win entitlement based on a size of the selected subsets of the symbol display positions, and to evaluate the selected symbols within the selected window based on the selected win entitlement.