I've been playing the early versions of GB Doom for quite some time now, and it seems to be progressing nicely. I still don't like how you have to die at the end of the Ecto1A level in GB1, but that's the only way one could conceivably get rid of the Ecto1A for the next level. Makes it kind of senseless to gather stuff in the firehouse though.

BTW, anyone catch that hilarous secret in the sewer level? Funny stuff.