How to Become A Ninja

First, you go to the Dojo and click on the Sensei. You will have to play Card-Jitsu many times against other penguins. When you win a few times, you will be given a higher level of belt. Once you have a blackbelt, challenge the Sensei. At first, it will seem impossible to beat him. Keep trying! It took me about ten tries to even win one card. Eventually, you will beat him. Once you are a ninja, go to the secret hideout and click on the book. There will be all kinds of items for you to buy. If you buy the ninja suit, and wear that and only the ninja suit and mask, and then dance, you will become invisible. Ta-da!