This really reminds me of one of my old maps, but yours is hundreds times better. The design looks great and the interlocking is nice. The platform where the shotgun spawns looks a little bit crooked, maybe straighten that if you're going to make a v2. Other than that, i can't really think of anything else you could change. I'll have to give it a dl and see if i can find anything.
So, i gives you a 4/5 :)