If you’re reading this, then the first-ever Border House Game Jam has officially begun everywhere in the world!
Your goal: make a game in Twine. Submit your game HTML file or a link to your game to firstname.lastname@example.org by midnight your local time next Thursday, October 4th (please let us know if we should include any content notes or trigger warnings when linking to your game). The optional theme, as suggested by commenter Rear Admiral of the Admirable Rear, is borders. Physical, geographical, mental; pushing them, crossing them, building them up, tearing them down.
Feel free to collaborate with others or ask questions in the comments here or in the IRC Channel. Good luck and have fun!