If you have created your own levels, and wish to release them, then you can place a link here. Alternately, follow the guide at Contributing if you want them to be in the main game.
The following levels are currently part of Icy Island. Template:Level list Icy Island
→ See also: Incubator Island
In the SVN version, there is a special island, Incubator Island. In this world are brand new levels that we plan to include in the main level set once they are “ready”, i.e. well tested and fun to play. You can actually help us by playing those levels and giving us feedback about them.
→ See also: Add-ons
The development version has the ability to automatically download some specially packaged levels, known as “add-ons”. Simply ensure you have an internet connection, and select “Addons” from the main menu, where you can choose to install the currently available add-ons.
Additional Add-ons can be installed manually. You can either obtain them from an external source or make your own. You will need to perform the following steps to play these add-ons:
External add-ons may suffer from more bugs than those automatically downloaded through the game client. They also may not conform to the level design criteria and difficulty requirements for SuperTux. If an external add-on fails to work properly, try to contact the developer of the add-on directly.
The archive of the add-on collection put together by lmh can be found here. To reduce the clutter on the bugtracker, a forum has been set up to discuss issues with the individual add-ons. All add-ons available to the in-game add-on manager as of June 2013 (461 levels in 16 entries to contrib levels) can be manually installed as a single add-on available here.