1. A gaming device comprising: a display configured to show a grid formed by a plurality of elements; and a processor configured to: mark each of the plurality of elements with one of a plurality of markings, where at least one of the plurality of markings is a feature marking, position a plurality of feature indicators between adjacent elements forming the grid, indicate elements that have a feature marking and are adjacent to a feature indicator, re-mark elements that are adjacent to the indicated elements when a feature indicator is positioned between the elements and the adjacent indicated elements, respectively, and determine an outcome based on one or more combinations of the markings.