Man as soon as i started the game i found the debug room and spoiled all the fun, you should remove it from the game.
As far as I'm aware, you're the very first person to find it. :D No one from any of the 3500+ downloads but you has mentioned finding it.
But just to be extra safe, in a recent version I password protected it and then scattered clues for the password throughout the game, the last clue towards the end of the game.
there was no save point before it so i had to repeat about a half hour for nothing.
I'm sorry to hear you had a difficult time with the Runic Tower. However, for future reference, there is a Obelisk of Memory at which to save on floor 11.
The link for smbx v1.3 doesn't work. Awwww. I wanted to give this a try. :(