Weren't they reconsidered back when the programming team changed level and tileset formats?I can only guess that they were supposed to be made the same way as they were in JJ1, as in that you design the stage in JCS as it would look FROM THE ABOVE, and JJ2 would display it in 3D, much like the Doom engine.First of all, there'd be obviously 3D gems. Seeing as Epic decided to put enemies in secret levels, and that there were plans for a 3D Bird object, I'd say there would be some kind of enemies in bonus stages as well. One bonus per two levels? I have no idea.