The treasure-hunting aspect of the game is really fun but the timer whilst you're out in the overworld is completely pointless and serves no meaning.

Also I went to Dream Den before Hole of Heroes and I didn't get the ending, because I didn't collect all the treasure. Was really hoping that Pikmin 2 would end with an unskippable one hour cutscene of the President doing that invisible eating thing he does at the start as you just sit there questioning the choices you made that lead up to this moment