A computer device having a user interface configured to display user actuatable game elements in a game board and to detect user input when a user engages with a game element in a move; a processor configured to receive a detected user input and on detecting a match game condition of multiple tiles in a first direction to control the user interface to remove at least three game elements from the display and to generate replacement user game elements for a subsequent move; and a graphics rendering component operable to render the game elements on the user interface, each game element having a graphical representation on a tile having a background appearance.