This game is great.  It plays well, it looks good (besides compared to DK64, Banjo-Tooie), and it does not slow down at all.  Now, this is a platform game and you do not just try to jump up to some wall that is too high.  You will have to solve puzzles.  So nobody should complain because good games will challenge you.  I only complain when the games are too easy and does not require brains such as Super Man 64.