I stumbled across this hosted on archive.org a while ago. Their in-browser emulator seems to work a bit better for me, so you might want to try it if you are having trouble with the version linked above: https://archive.org/details/flapple_bird_dagenbrock
I wonder if it would be practical to programmatically generate an audio file for the game so that it could be loaded straight from the web without using a disk. Similar to the Apple Game Server http://asciiexpress.net/gameserver/