This is probably one of my favourite forges of all time. 100x better than the original, in my opinion. Only critisism is that the grav lift floats...
I just had a quick runthrough and even though it is well forged and a cool map, it feels like it needs more. A bottom level would be fantastic.
After a quick run through, I can say while your geomerging is very nice, there are a couple of objects that could have been interlocked to look...