I'm in a pickle here.
Final stretch of the level, according to Dutchy's Walkthrough:
I see no levers at these sides of the pool, and each area is closed by a door. Is there a trigger/switch somewhere I missed on the way or some glitch related to saving/reloading?The Lava Spike Room.
Jmp to the other side, follow the path on the Picture. Start with the 1st ledge R and standjmp to it when the Spikes are about to go up, do a runningjmp with sharp L curve to the 3rd, (discard the 2nd) and a standjmp will get you to the safe 4th. Runjmp to the 5th from the L side of #4 when you expect the Spikes to come up and a runningjmp will get you to the ledge at the switch. Pull it (see the lave turn to water) and from this ledge, runjmp back to the 5th again at the moment you expect the Spikes to go up and a runningjmp to the safe 4th. Don’t use the 2nd ledge again and standjmp to the 3rd when you expect the Spikes to go up. A runningjmp with a sharp R curve will get you to the 1st and a runningjmp will get you to the exit. Go to the room with the lava pits, near the Blade pool room and go both sides to throw 2 levers and pick up some goodies, dodge the Skeletons and go to the Demigod room, shoot the Twins and leave these wonderful levels through the gate E.