Rendering an image of a game board on a display comprising a plurality of tiles and a tumbler object abutting at least one tile; recording in a memory the position of the tumbler object in a physical world; detecting a user input to insert a new tile; detecting if the new tile creates a match with two adjacent existing tiles and if so rendering a new image of the game board on the display wherein the new and two existing tiles are removed; detecting in the physical world if the tile abutting the tumbler object has been removed and if so rendering an image of the tumbler object falling down the display under a simulated gravity imposed by a physics engine; and monitoring the position of the falling tumbler object and on determination that one of its edges abuts another tile, preventing it from falling further.