I don't think Eclipse respects typeloaders yet. The built-in Gosu
editor does, however. Just be sure to launch it using the main() from
the example above, rather than using gosu.sh. There's also a special
manifest entry you can add to any Jar file in the classpath in order
to get other typeloaders added automatically, "Gosu-Typeloaders",
which should be set to a space-delimited list of fully qualified class
names of typeloaders to include in the typesystem.