Yeah that's especially for this reason that I wanted to create a such level (even if the events are mainly programmed using Linedef Executors, not only FOFs).

About Jasper's message, I shall agree with him on several points: the "electric fiend" is in fact a Linedef Executor that is trigerred randomly (maybe I should say "SEMI-randomly") to hit the players and make a noise. I was worrying about this especially, the frequency of the hit is too high. Since it is a random call, I can only increase the range of the hit frequency, and eventually the minimum frequency.
Other than that, what you said is overall true, but I wonder how you can lose yourself in a three rooms single corridor... Personally when I play a level like this one I always explore each room carefully, plus remember this level is only a beta, the final version (if it comes...) won't be only a corridor with rooms on the sides, there will be doors or traps (did you met "Eggman" wind? XD) that players need to open or pass through to access the following of the level. That's why if the player(s?) just move forward he(they...) will be forced to come back to look for the switch or the mechanism that will allow the passage.

A last thing, I'm really not a good spriter, then if someone could help me by creating a eyeless Sonic and Tails, it would be very welcome.