Klonoa: Door to Phantomile's revolutionary take on the genre is really cool, but not without its fair share of problems. However, it needs to be commended for not only trying new things in the gameplay department, but also for giving a lot of attention to the story that sadly is often neglected in the genre.
Pros: Absolutely charming music and characters, for the genre unusually ambitious story(telling), neat if a bit simple level design and boss fights, cool gameplay mechanics, brought revolutionary gameplay ideas to the table
Cons: 2.5D platforming, hit detection and checkpoint system are all flawed (but it only becomes annoying at the very end of the game), once you beat a stage you can't go back to it, the last platforming level is naturally the hardest one yet, but also far too long followed by a boss fight that accentuates all gameplay problems, gameplay and level design aren't strong enough to warrant repeated playthroughs