Originally Posted by Scrummy64
The real 'challenge' in the game comes from completing it fully, which is kind of the whole point. If you're just playing through the levels and not worrying about all the Time Trials, Electoons or Skull Teeth then it's not too tricky.
Agreed. And that's the case for almost every game and a solid way of balancing one-difficulty games. "Want more challenge? Do more challenges!"