Bring the game in your head. Make it testable.

Marvin listens first, asks one useful question at a time, and helps turn an exciting idea into a tiny experiment you can actually build.

Voice room

Hello. Tell Marvin the game you keep thinking about.

Tap the voice control below to begin. You can start anywhere. Marvin will try not to improve the idea before understanding it. A disappointing restraint, but useful.

Build In Public University

Enroll once. Keep learning.

$42 one-time tuition for lifetime enrollment in the course system.

View enrollment →

First playable moment

Find the first clue.

Play the smallest version of Sheep and the Lost Shepherd.

Play the prototype →