These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: The fact that if you die, you can continue right where you left off (including right in the middle of a boss fight) as long as you pay a piddly sum of coins.
It's Short, so It Sucks : This game has a pretty bad reputation for being over rather quickly, going well with Luigi's Mansion on the 'list of Gamecube games critics took points off of for being short'.
That One Puzzle: One of the underground puzzle rooms from Pecan Sands, which involves punching arrow blocks in certain directions in a certain order to get to the diamond. It is very difficult to solve out without a guide or prior knowledge.