Upload an image to be used as a background for all the tasks and after answer comments within a game. This will allow the game creator to create a themed background to the game. 

The screen will be filled with the image, so that part of the image will not be visible if the ratio does not correspond to the screen size. Maximum size for the task background image is 10mb. The image will be resized on the server to the size of 1200 px for longer side.