I think it would be more convenient if “default” scene (one game starts at when run from executable) could be set without reordering existing scenes.
This is how it works in most gamemaking software I’ve seen: TGF/MMF, Construct (not sure about C2 as I never used it), Stencyl, CraftStudio. It seems like only GameMaker and GD are weird ones with default scene depending on scene order.
In scene list, then “default” scene would be drawn using bold font and to set such scene you would right-click and choose “Set as default scene” (or “Set as start scene”, doesn’t really matter).