Instructions
Go to the "Ninja Kiwi" homepage and then log in using either your "Ninja Kiwi," "Moichi Games" or Facebook login information. If you do not already have an account with any of these services, you can click on the "Register" link and then sign up with some basic information.
Select "Coins" from the drop-down menu on "Ninja Kiwi." You can select either "Earn Free Coins" or "Buy More Coins." If you click on the first, you can view videos, complete surveys or participate in special offers to get coins. If you click on "Buy More Coins," you will need to enter credit card or PayPal information to purchase the points.
Go back to the "Ninja Kiwi" homepage. The coins should automatically be added to the top of your account, and you can spend them in-game for content you want.