To get it on stream - make sure to check if it haven't been streamed already in this doc: https://docs.google.com/spreadsheets/d/1d8KnACOrjq4uovfxN_oKNopEp5COeuyhu75Se13J... .
If it has, there will be a link so you can see people play your game, if it's not, someone is going to play it shortly. If you want someone specific to play it, the streamers open up topics that you can sign up to get your game streamer by dropping a link. I believe the current topics are by:
ToriFloop
Jade the Kobold
Ultimately all games will be played.
To be eligible for random prizes, make sure to upload your game to gotm.io and notify Adrian (Redefine Gamedev) on discord that you did and give him the link!