when you get to the end of the hallway, you find yourself in first training room. Now, this age is more of a IC Maintainer's age, not like Camp bravo, instead of finding age flaws, it will train maintainers for fast reflexes etc. (sort of like what the wall was designed to do) the room you enter is a Lava room. The room has no lights, and the only lightsource is the flowing magma below you. The floor will be made of a sort of crystal, in which you can see the magma below flowing... the first pit you come across, you will have to cross narrow wooden ledges to the other side, and from there, cross a group of Lava rocks floating in the water (yes floating, I'll make them kickables, and they could very easily fall over, and the avi will panic link.) Once you get over that pit, there is one final test in this room: four canyons of a sort of "waterfall" of lava are in front of you, you must walk in between these pits, and to the other side. For now, that's all I'll tell you... but there WILL be other rooms.
here's the link in room: http://www.mediafire.com/?i09cueyj0hj It looks better exported to URU than it does in blender... and I haven't added the sign yet, because it was originally supposed to be a prison age
but feel free to improve the lighting, or make any necessary changes 
O, and would someone mind making this texture less tileable?
, in one of the areas you talk about, you might try making a "Build The Bridge" type deal, where the explorer can either do the jumps as you talk about, or they can try pushing kickable objects around to build a crossing of some sort. Don't think anyone else has done this yet, except D'lanor's Prad Age with his shells (but the goal is different).
