Me and two friends just got done doing the Game Maker's Toolkit 2019 Game Jam. It was a bunch of fun and we ended up using my custom game engine inspired by Handmade Hero so I figured I would share here in case anyone would like to play. The theme of the jam was "Only One". We made a game called "One Robots Single Limb Adventure" or ORSLA for short. It's a game about a robot who only has a single limb. He can change which limb he is using but he can only have one at a time. It's a simple physics based platformer.
It's a bit difficult and there's not much tutorial but it was a bunch of fun to make and it's the most successful game jam attempt I've had. You can check out the code on bitbucket if you would like as well. We used Box2D for the physics engine. We originally planned on trying to use Godot for the game jam but found out that their physics engine joints don't seem to support motors/torque application.
You can find the itch.io page here: https://stampede247.itch.io/orsla
And a youtube video of the gameplay if you don't feel like downloading it (or get stuck and want to see an example of how to move): https://www.youtube.com/watch?v=OzbFldpWVJo
And the bitbucket page here: https://bitbucket.org/stampede247/gamejam/src/orsla/
Also here's some screenshots: