Fable 5 Endless Runner

A shippable mobile endless runner built and monetized in a weekend using Fable 5.

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Description

A React Native (Expo) mobile game featuring physics-based jump mechanics and rewarded ad integration. The developer shares a detailed tutorial on using agentic AI to handle the full build lifecycle, including code scaffolding, monetization hooks, and cost analysis.

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Details

Why this is interesting: Demonstrates Fable 5's long-horizon agentic capability to build a shippable, monetized mobile application from a…
Built with: K2.7 Code North Mini Code Fable 5
Tags: #mobile #react-native #physics #monetization

Discovered: X
First posted: X · Jul 3, 2026
Listed: Added 45d ago
Build: Moderate
Models: Strong

Prompt

Build an endless runner mobile game in React Native (Expo).
Requirements:
- one-tap jump mechanic, gravity, ground collision
- obstacles that spawn off-screen right and scroll left at increasing speed
- collision detection between player and obstacles
- score counter that increments over time, persists high score locally
- game over screen with restart
- clean separation: game logic, render, input in separate files
Use react-native-game-engine and matter-js for physics.
Set up the project so it runs with expo start.

Source