Ultimate Fenix is an interpreter to play games coded using that programming language.
Until now there was only the Fenix GP2X ported by Puck2099. The difference between that and this one is basically the Fenix version in which it’s based. Ultimate Fenix make use of Fenix’ engine 0.92a, but the “old” Fenix uses 0.84.
All efforts will be put into this “new” engine. Old Fenix games might need minor rewrites to get compiled.