What it is
UP! with a stranger is a two-player co-op climbing game in which each player controls a clay character, and the two are tied together by a string. The jam description has the route running from a backyard up toward space, and the string must not break. The string shapes everything, since both players have to coordinate to keep climbing. It was made for Vibe Jam 2026, whose rules require at least 90% of the code to be written by AI.
Who it's for: Players who like teaming up and coordinating every move with a partner.
Before you start: Under Vibe Jam's rules it's free to play in the browser with no sign-up, and the jam lists mobile support. The homepage is in English and lets you play with a stranger or a friend, with a high-score board. The page does not state an age rating.
Based on public information from Vibe Jam and the game's site. Not tested by AI Inspiration World.