Some fixes I have to suggest:
The water extends out of the cement, it's invisible but you can still go in it.
...
stuff I forgot the rest x3
But I honestly LOVE this map, it's my favorite of them all, (seriously,) but I do wonder if you can maybe make an admin-lounge sort of thing below the ground, like, I built one, but if you F8 you can get under the ground next to the pool, there's no water in one spot and it would be kind of cool, don't you think?