Just mediocre. This kind of labryinthine, interconnected levels onyl work if you've got a sort of automap, especially if the design is as samey as this one. It's also just too easy to miss key items and it'll keep you wandering and constantly getting lost. The story is ridiculous and the visuals are subpar to say the least. The use of texture is inconstent in the sense that some of them are quite hi-res and others look taken from a PS2 game. The puzzles are obtuse and not really puzzles, just: find key, open door, find thing, put it somewhere.
Skip this one unless it's on sale.