I've been playing through this. It's a lot of fun! I just need to find Level 9 and figure out how I missed the Blue Ring in the Fourth Quest to wrap it up.
thanks. for some odd reason the game loads the 2-way staircase passage on one room in level 9 of the 1st quest but loads an incorrect 1-way staircase passage in that other room with the 8 orange wizzrobes after pushing that block to open the stairway entrance - at first I thought it was a one time problem but I can consistently reproduce the problem on different NES emulators like FCEUX, Nestopia & Mesen (occurs every time).
I encountered the same issue in the Third Quest Level 9. If you kill the orange wizzrobes and push the block to go back down the passage, the game loads an empty treasure room. If you then go back out you load in the middle of your hearts and are soft locked. It's all there in the screen shots posted above.
Found the first issue. LVL2 in the 3rd quest has a problem. In the room with the Red Lanmola's is a shudder-door which never reopens, effective trapping the player in the latter part of the level. The only way out is to get the triforce. If you re-enter that part of the level you are fully trapped with no way out. That shudder-door should be set to reopen after the Lanmola's are defeated. Needs to be fixed.
I also want to point this out as well, as I had the same problem in my play through. It's not game breaking, but is irritating if you want to return to the first half of the dungeon.
And as it's been mentioned, there's no map in Level 3 of the Fourth Quest.
Overall it's a really fun hack, and fixing these minor issues would really help make it that much better.