Release Candidate 5
http://www.mediafire.com/file/o23m25...Heavens_DX.qst
In the first dungeon (Accessed via the raft) get the first Key and then head to the locked door in the room adjacent to where you got the key. Go through the locked door and you will find a floor switch that doesn't appear to work, I couldn't find a way to progress beyond this point in the game as the other path is blocked by a locked door leading me to believe the switch does something important allowing me to progress to an area that features an additional key.
I am unsure if it is a bug in the way the quest is designed or a bug in the Zelda Classic engine.