This was an experiment with MuseScore I made time ago trying to learn about music. I wasn't intended to be sad, but it came out like this.

I feel it could work for a game over. But you're free to choose!

There's no need for attribution as I'm not a musician myself, but if you'd like to do so anyways, you could attribute GearFox98 - https://opengameart.org/users/gearfox98