Zen-Mode High/Low

A calm card-flip game for short mental resets.

Built for people whose brains are running a little too hot.

Play the live app | Launch copy

Why People Might Star This

• It has a clear product angle instead of feeling like another generic starter repo
• The game loop is tiny, tactile, and easy to understand in seconds
• Zen mode changes pacing, motion, and audio rather than acting like a cosmetic toggle
• It works as both a playable product and a readable full-stack sample

What It Does

• Standard 52-card deck with simple HIGH / LOW decisions
• Score-only gameplay with no payouts or redeemable prizes
• Softened visual mode for calmer play sessions
• Ambient loop support with synth fallback
• Local persistence plus optional Supabase auth and cloud sync
• Shared billing scaffold and Android companion app

Quick Look

• Open the app, look at the current card, and choose HIGH or LOW
• Ties are Push, so score stays flat
• Fair, Demo: Always Win, and Chaos: Always Lose modes make it useful for both play and testing
• Mini goals and streak tracking give light structure without turning it into grindy progression

Stack

• Next.js App Router
• TypeScript
• Tailwind CSS
• Supabase for auth, cloud save, and leaderboard data
• Stripe billing scaffold
• Native Android companion in android-native/

Run Locally

npm install
npm run dev

Open http://localhost:3000

Production Build

npm run build
npm start

Tests

npm test

Cloud Save Setup

This repo includes magic-link auth and cloud sync for the web app.

1. Copy .env.example to .env.local.
2. Add:
   • NEXT_PUBLIC_SUPABASE_URL
   • NEXT_PUBLIC_SUPABASE_ANON_KEY
3. Run the SQL in supabase/migrations/0001_game_profiles.sql.
4. Enable email magic-link auth in Supabase.
5. Allow these auth URLs:
   • http://localhost:3000
   • https://highlowgame.vercel.app

Do not expose the service role key in the browser.

Billing Scaffold

Shared billing and entitlement support is included for:

• web_only
• all_access for web + Android

See supabase/migrations/0003_billing.sql and docs/BILLING_SETUP.md.

Promotion Notes

• Launch copy is in docs/LAUNCH_COPY.md
• Third-party audio tracking lives in THIRD_PARTY_AUDIO.md
• Replace the promo image with a real gameplay GIF when you capture one

Important Product Note

This is a score-only game experience. No cash value, no payouts, and no redeemable prizes.