The Pipes Game
from
http://squeak.preeminent.org/for Squeak version 4.1 loads and runs fine for Squeak 4.4-12324 as well.
http://squeak.preeminent.org/source/4.1/SqueakPipe-sbw.22.mczSqueakMap has an entry for Squeak version 3.9 and that points to
http://www.squeaksource.com/SqueakPipes/SqueakPipe-sbw.23.mcz--Hannes