Ah, I see that I should have read the change log more carefully.
Thanks for being very responsive!
There seems to be a new graphical bug. Some objects appear to have a lot of banding.
e.g:
Grass (not the best demonstration, but there is significant banding on the grass in-game)
The game sometimes wouldn't load when I selected it in the menu. I wasn't able to load my save at all.
The exit button in the menu also didn't work for me; I had to alt+F4 to exit each time.
EDIT: I'm not sure if this is a driver issue since I recently updated them.
The emulator opens automatically set in 4:3 fullscreen and is stuck on the white Unity splash screen.
I got this error log after the crash.
I've run into a bit of a problem. I cannot separate the background and the walls/floor of the second palace.
This means that Link must exist either in front of both the background and the ground he stands on, or behind both. Neither is pleasing.
I wish I had screen shots to demonstrate the problem, but I (stupidly) forgot to take them and I'm not ready to spend ~2 hours to get back to that point (for now, at least).
Look at this picture from the original. Now imagine that the background was (instead of bricks) a bunch of chains whose width scales the entire z-axis (from behind the red blocks to in front of Link).
This is strange because the first palace does about the same thing but can be separated just fine.
Is this a bug with 3DNes or some unfortunate effect of the way Zelda II was programmed?
Unfortunately I don't think I'm skilled enough at Zelda II to get all the way through the game.
To be honest, I can't even beat the game with saving progress and a friend to help.
I might be able to set aside some time this week to reach beyond where I left off last time but I don't think I could ever reach the end in one run.