In true Final Fantasy tradition, FF:EN combines both fantasy and sci-fi elements into a satisfying adventure, with a lot of depth, numerous character-specific skills, and excellent battle animations. The summon spells in particular are very interesting, and cool to watch in battles.
Although FF:EN merely uses the default system that comes with RPG Maker 2000, it is implemented very well. There are numerous weapons, armors, relics, and other special items you can collect and use, and the magic system - based on character's level of wisdom - is one of the most fun I have seen.
Although the game is a bit short (it took me slightly less than 10 hours to beat it), there are many extras that will entice you to replay the game. Like Square's games, FF:EN boasts several mini-games, a full-functioned casino, and optional sidequests. All in all, this underdog, despite its unofficial status, is a worthy tribute to Square's classic series. And that is a high praise indeed.