Currently working on some extra levels for Ten Ton Ninja with a Christmas theme. They should be available in the next day or so.
There's more extra levels that can be downloaded at http://www.addictive247.co.uk/tentonextralevels.htm
It's really simple to use the Extra Levels. Once you've downloaded the one you want (see instructions on the page link above) start the main Ten Ton Ninja game and select Custom Levels from the main menu.
Click on OK and you will see a list of the Custom Levels available to you. I think there were 10 in the original release of the game. Any new levels you've downloaded will also be in that list.
Just click on the level you want to play and then click on PLAY.
You can also use the Level Editor that comes with the game and design your own fiendish levels. Submit them to us at our main email address and we'll put them up on the website.