An endless-road RPG runner for phones. Your hero runs forward on their own; every few seconds three lanes open up ahead — a monster, a chest, a campfire, a shrine, a trader, or something unknown — and you pick one. Fights play out on their own screen as tactical turn-based duels with a timed parry. You loot and equip gear, level up, and when the road meter fills, a boss blocks the way with no lane around it. Beat it and the road moves on to a new biome. The road never ends.

▶ Play in the browser, no install needed. It's built for phones, so on a computer it opens as a narrow, phone-width column.

• Tactical turn-based combat: telegraphed enemy moves, weapon skills, brace, potions, and a perfect-timing parry (tap the hero as the blow lands).
• 150 item bases × 6 rarities with random affixes; 6 relic sets with 2- and 4-piece bonuses and their own fire / water / void / light combat effects; talents on level-up.
• 34 enemies, 20 scripted bosses with phases and passives, 12 biomes.
• Everything is procedural: characters are vector rigs drawn on Canvas 2D, music and sound effects are synthesised with WebAudio — no image or audio assets ship with the game.
• Fully offline, no account, English and French.

This repository is an experiment with Claude Fable 5.1. I had an old, almost-forgotten game idea — a short note in Russian (idea.md) and a rough sketch (image.png): a character at the bottom of the screen moving forward, three lanes to choose from, a level, a progress bar that ends in a boss fight, items to dress the character, an endless game.

I wanted to see how far the model could take it from a single prompt: that note, the sketch and a couple of clarifications, with every technical and design decision left to the model. The first playable version came out of that one prompt. After that, a handful of follow-up prompts upgraded it: make it a mobile app with room for monetisation, raise the visual and gameplay quality, fix the bugs I hit. Then I played it for a while and wrote down everything that felt wrong or missing in feedback.md — and that became the spec for the next round (parry timing, contact attacks, fight log, sets, gems as a currency, new biomes, a main screen, dynamic music, localisation, balance).

I liked the result enough to keep playing it, and I'm planning to release it on Google Play.

npm install
npm run dev -- --host   # open the local URL in a phone-sized browser view,
                        # or the network URL on your phone over Wi-Fi

Other commands:

npm run build           # production web bundle -> dist/
npx tsc --noEmit        # type check
npm run sim             # headless combat-balance simulator (see scripts/BALANCE.md)
npm run i18n:check      # English/French completeness
npm run android:debug   # debug APK (needs Node 22, JDK 21+, Android SDK 36; see docs)

Vite + TypeScript, plain DOM/CSS for the interface, Canvas 2D for the world and fights, WebAudio for sound, Capacitor for the Android app. No UI framework, no server.

• docs/PROJECT-STATUS.md — architecture, what's done, known gaps, backlog, release checklist.
• docs/ADS-PLAN.md — plan for rewarded ads in the Android release.
• scripts/BALANCE.md — every balance knob and the simulator results.
• store/ — Google Play listing texts (EN/FR), privacy policy, store graphics.

© NGdev. All rights reserved.