It is limited in its genre and gameplay. If one doesn't have a preexisting fancy for Castevania or Ponies, let alone old-school gaming systems it probably won't be that great. I however have all of the above.
better than I expected! The first 2/3 of the game is somewhat simple and aside from Manehattan, can be completed with little/no difficulty. The last 1/3 however is where it really shines.
The game its self is largely a mod of SOTN, but the artwork was carefully selected and the dialogue (except for Trixie, who uses excessive 3rd person) and characterization is authentic.
There's several main weapon types depending on one's preference: Whips, Swords, Spears, Bashing (hammers and stuff), Books (magic-ish), and Clubs. I assume particular weapons and armor choices pertain more to the type of pony you choose (I played an Earth Pony), and I went with a custom character (I assume the dialogue is different if you're one of the Mane 6).
The enemies and fights are themselves references and nods to various aspects of MLP, without being boorish or lazy. Many of the rare weapons and items are playful nods both to MLP and SOTN; Twilicane and the Staff of Sameness are weapons, and the Rainbow Thread, the Honest Bit, and (probably the best item) Boneless are included items, as well as others.
So far I've put over 8 hours into it and I'm not quite finished (unless they pull a 'surprise ending' like in SOTN, at which point I can't even begin to suggest how much gameplay might be involved).
All in all its easily as enjoyable as many fan-productions and Fics, except with a player-driven interact-ability and the extended play-time. I'm quite impressed with how much effort would-have/did go into it, and I haven't detected any particular bugs or system errors.Tl;dr If you have time to kill, its a nice distraction and if you're a pony/SOTN fan, its a delightful reprise of one of the best games of its time.