That's not a bad thing, it actually is good. Most of this game is different from the original with added/removed rooms, changed puzzles, etc. The Mansion for the most part is still as you remember it, but Memorizing the original won't get you through this due to many changes. This is MUCH better than the original and graphics are better than most games of this generation. The controls themselves to age too well but it just takes some getting used to. Whatever you do, don't play the original and expect to beat this in the same amount of time during your first playthrough, the game has enough changes to make it seem like it's own game rather than being just a remake.
yes: I recommend this product