Action · Adventure · made with Claude
UP! with a stranger
Climb from a backyard to space as two blobs tied together by a string.
About UP! with a stranger
Two plasticine blobs, one string, and a stranger on the other end. UP! with a stranger is a cooperative climbing game for two players: each of you controls a blob, and together you work your way up from a backyard toward space and beyond. The one rule is that the string must not break.
The creator comes from an art direction background and describes the mix as a cross between Purple & Brown, It Takes Two, and Flappy Bird. The look draws on childhood games, with a clay-like art style and small odd details. It is their first shipped game, built with Claude Code and, they say, 99% vibe coded.
One goal was to see whether AI-built work could still feel handmade and full of personality. The pairing is meant for strangers, so the climb leans on quick, shared trouble and a height to beat.
How it was made
Most of the code was written by AI. Source: Vibe Jam 2026 submission form.
Evidence: the creator's own account.
- AI provider
Anthropic- AI tools
- Claude Code
- Engine
- Three.js
- Players
- Online multiplayer
Questions about UP! with a stranger
Is UP! with a stranger free to play?
Yes. UP! with a stranger runs in your web browser at no cost, with no download or account needed.
Which AI was used to make UP! with a stranger?
UP! with a stranger was made with Claude Code and Claude. Most of the code was written by AI, according to the Vibe Jam 2026 submission form.
Can I play UP! with a stranger on my phone?
Yes. UP! with a stranger supports mobile browsers.
Who made UP! with a stranger?
UP! with a stranger was made by ilyxxxa. See their profile on GamesByAI for their other games.
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