Anyway, the applet is just a silly little thing. After you unzip it, open web.html in Internet Exploder. Then select a duration from the ones at the upper-left, enter notes using the keyboard buttons, and watch as they show up on the music bars. Then, push "play" and the applet will play the music back for you, but as if the sheet music were upside-down. In other words, this:
Would be played like this:
However, there are many limitations. It must be run in IE, it's written in Logo (*shudder*) and requires a special plugin, it's bulky, and it's really, really, really freaking stupid. Plus I think I'm the only one who ever thinks about crap like this.
