SuperTux is an open-source classic 2D jump-and-run sidescroller game,
in a style similar to the original Super Mario games.

Run and jump through multiple worlds, fighting off enemies by jumping
on them, bumping them from below or tossing objects at them, grabbing
power-ups and other stuff on the way.

In addition to the Story Mode, there is a large amount of community
contributed levels available as add-ons or in the forums. Everyone
can contribute such content by using the integrated level editor.

If you get slow performance, disable the use of OpenGL in the
"Options" menu after SuperTux is started.