Rules: Turfed out of your home for your awful singing, you must explore the Mysterious Caves, defeat the Mysterious Monsters, retrieve the Mysterious Musical Notes and collect the Mysterious Gems so that your songs might become a bit less awful.
Controls:
Keyboard:
Cursor keys to move, Space to jump, Left Alt to sing.
Gamepad / touchscreen:
DPad to move, right button to jump, left button to sing.
Source, Copyright: https://github.com/benjymous/js13k-2019-singsong