Woah, this is really nice for your second map. I feel that you put some serious work into the map that isn't usually seen by most mappers. However, I do feel some things can be added to make the map practically perfect (heck, nothing's perfect!)
I feel it's a tad too dark, and the geometry around the pool feels a little too repetitive. Maybe add some different looking shapes in there and that would make the map really good.
I have to say you did a really good job with the map. You put some really cool elements into the map that I've never really thought about. Great job!
Keep up the great work. I look forward to seeing some more releases by you!