I'm not really interested in help with the programming parts right now,
unless that comes down to finding and fixing bugs in either the SGE Game
Engine or xSGE (which are both publicly available). But if someone wants to
make some levels for ReTux, and can make good levels, then I would accept
that contribution (as long as it's libre).
Levels are made in a libre program called Tiled.[1] I'll be releasing a
written guide to making levels and worldmaps for ReTux, and possibly a video
tutorial as well. For people who don't have a copy of ReTux, a small package
containing the necessary graphics and map editor data to edit levels and
worldmaps will be made available at no charge.
[1] http://www.mapeditor.org
