Well this is an interesting Age.
As I thought it is indeed quite nice looking. The lighting, the overall structure of the Age makes for a nice place. I spent a bit of time just sitting on some rocks looking at the opening and the sky above. The pillar structures surprised me as your first screenshot didn't hint at that, but it's quite original, a fresh change from other Ages.
However this place is very difficult to navigate. I like the jumping puzzles in Uru; and usually I can handle them but this cavern is really hard. I can't count the number of times I fell ( ). I guess this comes in part from the fact that you did this Age so quickly; with a bit of tunning it could probably be much easier.
Other than that this little Age is simple and well done. Everything is here: nice lighting, a bit of animated textures, some ambient sound; it really feels like a complete Age, and not a simple experiment. Also, this is a detail, but it's nice to hear birds, gives the whole place a larger dimension.
So aside from the jumping parts, this is an original and enjoyable Age. I look forward to more of your Ages.