Game Editor Manual Chapter 5
Editing a GameDouble clicking on a game in the list of games opens the game for editing:
The game editor's main window is divided into two parts: the game element editor on the left and the property panel on the right. The game element editor displays the game's structure, the property panel shows the properties of the currently selected game element. To select a game element (game node, level or region), click on its header (the upper part of the game element).