Set this to false to improve performance. Under Windows, the options file can be found in the config subdirectory of the Tux Racer installation directory. Note that on both operating systems, you must run Tux Racer at least once before the options file is created. If you have run Tux Racer but there is still no config directory, then try creating it manually and then run Tux Racer again. The options file should be created when Tux Racer exits.
Key bindings are case-insensitive.
This is a limitation of the GLUT library that Tux Racer uses. We may switch to a different library in the future to eliminate this restriction. Version 0.60 has experimental joystick support. If you are compiling Tux Racer from source then you need to have a version of the SDL library with joystick support installed. Tux Racer will use the first joystick on the system.