The Control room; press the buttons then pull lever to return to entrance.
From the entrance.
1) The sarc leads to the first floor. Up and right to the Trollkings
and Impkings. After you kill the Impkings go back in the trapdoor to warp
to 2nd floor.
2) Or pull the lever (at entrance) to go direct to second floor: first
fight is 2 furys, up and kill bats, right, up, right and down to Bounty
hunters and then go back up and left to trapdoor, down to 4 devils and
lever, which warps to 1 down fron control room. See http://web.triton.net/hyjinks
for maps.