for one, you never stated that you tried it. you only asked IF it worked. naturally, it is easy to assume, you aren't being helpful to yourself and you were asking the community to test for you.
it uses mapper 163. so you should test with all the graphic modes, then test some other pirated roms which use that mapper. if both fail then its a matter of asking the nesds team to implement that mapper.
from what i've read the code for ff7 is very dirty, its possible that mapper is supported but the game is at fault.
there was a project to reverse engineer the rom and get it running on a different mapper, but it never got off the ground.
-another world