Dream Journal
I was in a large room that looked like a video game: there were different levels of raised flooring and rivers running from one side of the room to the other. I saw on my far left a bank of ten light switches. I had to figure out the correct switch combination to open the door I needed at the opposite corner of the room.
I hopped down one level and crossed over a small stream. When I reached the light switches, bad guys, creatures, and aliens came from different doors to stop me.
I fought them off for a bit until I happened on the correct configuration. A flying metal disk with robot-like tentacles hovered over me; I cut off a few of the tentacles and they screamed. I crawled on top of the disk so they could not get me. I was going to ride the disk to the now opened door.