The Second Death

The Second Death
Custom map for DOOM II

My first map for Doom 2. Hope you enjoy it, but either way, any feedback you could give me would be appreciated,
especially concerning the balancing and overall difficulty. 	
Tested in GZDOOM. UDMF format.
Map should be something of a medium difficulty, thought it's hard to tell, seeing as I already know all the 
surprises. 
First 3 difficulties have less enemies and more pickups than last 2.
If you want to use the custom music provided, just drag the file onto your sourceport, along with the map WAD.
Custom music is 'Countdown', by Alexander Nakarada.
Thanks for playing!