Alternate exits in Bit Trip Runner 2

Solution 1:

Each alternate exit (marked with blue arrow) unlocks a path to one side level. This levels are not required for story progression but can give you the following:

  • New playable character;
  • New costume;
  • Gold (thus increasing gold count to help open other side levels that require gold);
  • Trophies\achievements (some of them require clearing side levels);
  • Just fun from running around and jumping over stuff;

If you`re not interested in any of this, then taking blue route is not worth it.