You might remember end of last year's Game Off game jam sponsored by Github. The winners have been annouced a while ago, and while again quite a few submissions were using closed source game engines, the overall winner isn't.
So make sure you don't miss Sealed Bite, a fun little/short jump and run:
Obvious inspiration comes from the very popular Celeste game.
You can find the source code here, and not all that surprising it utilizes everyone's favorite Godot Engine :) Sadly the graphic assets are quite a bit less free (CC-by-NC-ND).
Let us know if you enjoyed this gem of a game on our forums!