ruby-sdl is a language binding for SDL 1.2, which is unmaintained upstream
(superseded by SDL 2).
Is ruby-sdl still useful, or should it be removed from Debian? It seems
there is only one package that depends on it: magicmaze.
If ruby-sdl has optional features that magicmaze doesn't use, then it
could be useful to disable those optional features. In particular, if the
bindings for libsdl-sge and libsmpeg0 are not needed, then turning those
off would get us one step closer to being able to remove those libraries.