This is the stable version of SuperTux, also called Milestone 1. It provides a polished gaming experience and is the overall recommended version.
The development snapshot is an unstable version of SuperTux, meant as a technology preview and for people who are not afraid to write bug reports.
Please keep in mind that this is a work in progress! Everything you see here is subject to change and may even be removed.
Other sources of SuperTux, for example the Git repository, are documented on the: