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Describe a game, play it in minutes | Rosebud AI

Describe a game, play it minutes later. Rosebud AI's agent, Rosie, writes the code, art and sound while you steer by chat, and the game runs in any browser, phones included.

Slapjam guide · September 2026

Talk it into a game

Describe the game you want, or start from a template or someone else's game and remix it. Then keep talking: faster enemies, a boss, a new level. Rosie writes the code, the art and the sound as you go, and you play every change the moment it lands.

Build in steps, not one prompt

The best Rosebud games come from small steps: get the core loop fun first, then add to it. Rosebud's own team explains how, and it is good jam advice for any tool.

Straight into your Slapjam entry

Rosebud games are HTML and JavaScript, so they already play on phones. When you are done, paste your game's link into our converter and you get a file itch.io accepts as your entry.