The goat sound effect, used in the sample game,
Avoid the Bug 3D, has been downloaded from:

http://soundbible.com/619-Goat-Bah.html

It has been converted to the OGG format (bah.ogg).

Many thanks to the creator of the sound who has provided it
with an Attribution 3.0 license. I suppose that that means
this one:

https://creativecommons.org/licenses/by/3.0/
