I've been working on this toy for a while now. The big challenge was to get "game sounds" to play. It's still not too robust, at least on my slower machine; but maybe it'll work well for you. The other big challenge was simply to make a runtime solution out of it - eesh - 30 attempts later ...
This is a recreation of the old 1970's electronic game called "Simon". I enhanced it to be appealing to music educators in that it demonstrates five different musical scales.
Here's Beta to you, kid.
Cheers, Dave on 14/Windows
(p.s. I promise that this file does nothing to contact the internet.)