A computer device is configured to provide a computer implemented game. A display displays a game play screen comprising a first area and a second area, the first area of the game play screen comprising a game board comprising one or more first game objects to be collected in response to user interaction. A processor causes items to be provided in the second area of the game play screen in response to the user interaction to satisfy game objectives associated with the second area of the game play screen. The processor determines a first contribution associated with an in-game currency to upgrade an upgradeable image associated with the second area of the game play screen and whether the respective level has been completed and to determine a second contribution; and if an accumulated second contribution from the completion of levels satisfies a criteria, provides inventory items which are usable to unlock or upgrade a respective item.