SuperTux 0.7.0

SuperTux 0.7.0 has been released as one of the biggest updates since Milestone 2, featuring new Tux sprites and abilities, revamped graphics, a complete story mode rework, new enemies and NPCs, a level editor revamp, and local multiplayer. The release also includes internal improvements like migrating to SimpleSquirrel, CMake refactoring, and Android/Flatpak build support, along with numerous bugfixes.