NOTE: This is a beta release, meaning that there will be bugs and that features are still subject to change! If you run into any issues or bugs, please report them to us so we can take a look.
SRB2 Classic supports more than just Windows and Linux, but pre-built packages are not provided for these platforms. Other platforms requires building from source. Follow the instructions here. For assets, you can either copy them from the Windows build, or build from source.