A game board is displayed on a display of a computer device. When a user engages with one or more game elements in a move, at least one processor of the computer device determines a first characteristic of a game element associated with the triggering of a first game element, a first direction associated with the triggering and a first set of locations along the first direction. The at least one processor is configured to associate each location of the determined first set of locations with a game element having the determined first characteristic.