Change the default appearance of the game
You can change the Robots backdrop and the different robots that are present in a game by changing the game theme and background.
To change the game theme and background:
Press the menu button in the top-right corner of the window and select Preferences.
Select the Appearance tab.
Select a theme from the Image theme drop-down menu.
To change your background color, click the button next to Background color. Select a color from the available choices and click Select.