Being able to go behind the building at the start is unintentional, not sure how I missed that
I deliberately didn't mark the BFG as a secret since I thought it was too hard to find to even be an official secret.
I've moved the other cars further away from the wall to make it clearer that you have to choose that one.
I have also added a way to get back from the yellow key area:
I'm glad you think this map is impressive, I almost went insane making it :p