How to play

[Akumasama]

Well, that should work.
However, just to be safe, try giving it the name "start1" or something, then going into your "custom_story_settings.cfg" and change "StartPos=""" to "StartPos="start1"".

Also, maybe a very stupid question, did you place lights?
You might also want to try placing a box-light on the whole map, just to see if you spawn inside the actual part you built.