The Geometry Friends framework comes bundled with a level editor, which allows participants to create their own levels to further challenge their algorithms. The Level editor can easily be accessed through the Main Menu of the Geometry Friends game.
Through the main menu options, participants can create a World or edit a Level. By creating a World participants are technically creating a new set of levels (obviously beginning empty), which users can then fill manually by creating new Levels for that world. Editing a Level allows users to edit already created levels.
The Toolbox includes the following options (described from top to bottom, as seen within the ToolBox window):