Demo! I think most of it is me searching for secrets in vain.
Enjoyed the map, not going to set the world on fire, but it was fun :D
You had a lot of nice texture alignment... but those cop1_1 pipes bugged me with how much you could see the texture repeat!
There was a part with a vore stuck in a wall that was weird too.
The layout was nice, but there were 2 things I think were poorly planned out...
When you first get the Silver key by that Vore, you haven't nessicarily been shown the door it goes to, and there's a exit from that silver key area leads you away from the silver door to earlier parts of the map, which confused me because I thought I was meant to backtrack to a silver key door I hadn't seen.
The second is more minor, but I think you could've done more with the multiple silver keys. There are 2 to pick up in 1 place, but the doors are encountered in a linear fashion, and the second door even has a shortcut back to them. I think it would've been done better to have something a little more nonlinear with them.
Still, a fun little map!