A free app for Mac, by Marek Kapolka.
Stomp Plonk is a walking simulator where you walk around a fantasy continent with a lute and hang out with musical NPCs.
In this game, you can find a lot of characters that will play the song you are walking to.
You will find characters such as a lute player, a piper, a chorister, a minstrel, a bard, a knight, a minotaur, a golem, and other monsters.
Also, you can find some of the best lutes that have ever been made.
In the game, you can control your character with the keyboard or the mouse.
The keyboard controls are very easy and intuitive.
You will be able to find the key you need to play the song by yourself.