devwithjev
— reading now— views
Submit a build

Jev Plays Through Super Mario Bros.

The author used Jev to complete Super Mario Bros. as part of a system designed to play through entire console libraries.

View on X costless than $4.23timearound 24 hours of back-and-forth
@TheINAOG@TheINAOG𝕏
One of my personal projects is building a system that plays through entire console libraries, expanding them over time. At first I was only getting about a minute of clunky gameplay, and it was taking way too long. With Jev, it took around 24 hours of back-and-forth and less than $4.23 to complete Super Mario Bros. I only had to step in with hints at three spots, one pipe and two castles/mazes, be
Sep 18, 2026X postsView on X
The author says the project initially produced about a minute of clunky gameplay and took too long. They stepped in with hints at three spots: one pipe and two castles or mazes.

Also filed under Games & real time

  • Steer a 3D Box with Goals

    The build steers a 3D box with plain-language goals. An LLM plans each instruction, while TypeSafe Jev makes move, turn, and jump decisions in real time.

  • Benchmarks Jev on Pokémon Red

    The project benchmarks Jev, TypeSafe’s fast decision model, against Jev paired with a GPT-6 Sol planner for playing Pokémon Red.

  • Plain-English Cellular Ecosystem Simulator

    LifePot is a cellular automaton-inspired ecosystem that users describe in plain English. Jev turns those inputs into species, feeding relationships, reproduction strategies, and environmental conditions.

  • Mapping Children's Behavioral Intent in Games

    Mores Research used Jev to map children’s behavioral intent in games and examine how it correlates with real-world behavior. It reports mapping intents across 45+ real sessions involving 20 child users over a long horizon.