This game does a great job replicating that old 3D-platformer difficulty, and it ramps up even more by the last stretch. The game is supposed to be 2 hours long (It took me 4 days to beat). Don't expect too much from the story, but you're free to dig around the map for lore.

If you're itching for some challenge- this is it. If you still find it too easy try the mirror dimensions hidden around the map (sick freak) I still recommend it for the experience alone. Its fun and not too hard, and you get to play as a goat too!