Levels are saved as cookies. If the browser is reinstalled, or the computer changed,
the Levels may be lost. But worry not, every time the Levels need rebuilding,
it will be faster, because You
will be smarter! Because of this technology, there is no registration required on Planeta 42, and yet the knowledge achievements can be saved.
versions of the games comes with embedded player, but
they will increase the local computer levels only, and not that on Planeta 42 website.