itch.io

There were prerecorded melodies that were going to turn into a "keyboard hero".  As for theme: you're playing a song but you're near the end since it's a short riff.  So, loosely related.  Thanks for the comment!

I spent a bit more time with it and reposted here: https://randompast.itch.io/keyboard-hero  As you can see, each level is real short.  So, "the end is near" it loosely fits.