I know you said you mainly work in Unity, but you mentioned having experience in GameMaker so I'll take it.
I'm making a free demo for a game in GameMaker, and would like to get a GML programmer to work on the coding for free before I hire someone else to do the programming in a paid position. I need more time to finish the game's art, animation, and soundtrack, all of which I'm doing myself. If you want to do the programming, you will need to have GitHub, be pretty decent at programming in GameMaker, and be able to easily read and build off of my own GML code, since I've already done a good chunk of the demo's programming myself.
I'm currently the only person really working on my game and don't have a team. Also, my game is pretty weird.
If you're interested, I'll discuss the game with you in more detail.
Here's some of the art for my demo, including some gameplay mock-ups I made:
