Ninja star tip
  When your strength gauge is full you can fire ninja stars without wasting any.

How to cross the river to Gadget Castle
  In the Underground 2 section of Stage 1, the path splits into two sections. Go
  up at the fork and follow the path to the bamboo man, and beat him at a game
  of Roulette to win Bamboo. Now you can cross the river to Gadget Castle, the
  first dungeon.


Hints by Felipe Gerhard - felipe.gerhard@gmx.net