A wagering game is conducted on a gaming machine in response to a wager from a player. In addition to a basic game, such as a slot game, the wagering game includes first and second game features. The first game feature is triggered by a start-feature outcome in the basic game and accumulates one or more award opportunities during a series of spins of slot reels. The second game feature realizes the accumulated award opportunities. The second game feature may, for example, be an interactive multi-choice selection feature such that the award opportunities correspond to selections of award-yielding selectable elements included in the selection feature.