Controlling a display of a computer device

A computer device comprising:

• a user interface;
• a memory;
• at least one processor;
• and
• computer readable instructions which when executed on the at least one processor cause the processor to implement the steps of:
• detecting a game element selected by a user;
• identifying a location on the game board of the selected game element;
• removing one or more game elements from the game board, including the selected game element;
• providing replacement game elements on the game board to replace the removed game elements, except at the identified location;
• creating a booster object at the identified location, activatable at the identified location, after providing the replacement game element on the game board.

A non-transitory computer readable medium having computer instructions stored thereon which when executed by a processor cause the processor to control a user interface of a computer device on which a game board of multiple user-selectable game element is displayed by performing the steps of:

• detecting a game element selected by a user;
• identifying a location on the game board of the selected game element;
• removing one or more game elements from the game board, including the selected game element;
• providing replacement game elements on the game board to replace the removed game elements, except at the identified location;
• creating a booster object at the identified location, activatable at the identified location, after providing the replacement game element on the game board.