I think this is using recomp, anybody with a rom could theoretically do this on their own pc, so there's morning to destroy. The recomp isn't specific to Nintendo and isn't really violating copyright, as far as I understand.
Edit: Unreal Engine, not Unity. My mistake. My point is that unless the project uses absolutely zero intellectual property, such as characters, stories, or franchise names, Nintendo will almost undoubtedly take ruthless interest.
It looks like the project is really careful not to include copyrighted materials in their distribution.
Source code automatically generated from copyrighted binary code is a derivative of copyrighted code, though. It's like taking a copyrighted book and running it through Google Translate and then clean up the sentences manually. You could be lucky that a publisher might not care about a translation into Icelandic but if you were to auto-translate a French version of a book into English and try to distribute it in the US, you'd probably get in trouble even if you leave out all graphic artwork.
Been playing it on Arch all morning - runs beautifully straight out the box on a gaming desktop. Forgotten how (a) dark (b) bastard hard it is. Superb game, tho, and all the loading screens being essentially gone adds back a bit of pace it was missing.
And yeah, mapping the weird N64 controller to an xbox pad is always going to be strange - been wasting a lot of items when I'd been intending to look around.