Play Cube-Violin 🎻 for your friends in my MMO &world-of-squares

You can be wandering along in the woods 🌲, hear a violin in the distance 🎻, and go see what this stranger is practicing!

Each string is a different wave (Square/sawtooth/sine/triangle). You press strings on the fingerboard with each row of your keyboard.
You bow the violin with your mouse; vertical chooses which string (you can do double-stop two note chords; they overlap!) horizontal makes volume (it's louder towards the 🐸 just like there's extra weight in real violin)

Uses mini_audio.h to play simple sounds. Because latency can vary, clients receieving other players' violin playing will delay the absolute time of the actions based on their ping.