I played this and it took me about 30 minutes to get near to the end until the mouse chased me around and suddenly caught up with me, killing me with an 8/9 cheese.
I do love this game......and after memorizing everything I finally got the ending today. (I'm very good at memorizing layouts so it only took playing the game nonstop for 2 days to memorize everything)
Incase you're wondering why the generator lead to an open door/where it was open It was because the generator opens the door and you have 30 seconds to go grab the cheese and get out before the door closes. Sketch just happened to walk past when somebody had pressed the generator