LaserVault Daily: Reddit Optics Tactical Heist

Daily procedural optics heist puzzle built natively with Reddit Devvit, featuring daily seeded bank vaults and global leaderboards.

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LaserVault Daily — Reddit Optics Tactical Heist

Submission for Reddit's Game of the Day Hackathon ($35,000 Cash)

💎 Project Summary

LaserVault Daily is an ultra-polished, daily-seeded tactical optics puzzle built natively for Reddit's Developer Platform (Devvit) using Interactive Posts and high-performance HTML5 Canvas / WebAudio.

Every midnight (00:00 UTC), a new cryptographic daily seed generates a unique security vault puzzle. Players rotate optical mirrors, beam splitters, and phase filters to guide high-energy lasers to the vault's core sensor nodes within par moves.

🚀 Key Features & Architecture

  • Deterministic UTC Daily Seed: Generated via linear congruential / xorshift PRNG ensuring all global Reddit players face the exact same tactical board on any given day.
  • 100% Solvability Guarantee: Validated through our BFS backtracking solver across 365 consecutive days with sub-millisecond generation time (0.022ms average, strict SLA < 50ms).
  • Interactive Post & Devvit Redis Bridge: Seamless 2-way postMessage between Devvit Custom Post container and WebView. Persists user streaks, par-move scores, and community daily leaderboards using Reddit's native Redis store.
  • Zero-Dependency WebAudio Synthesizer: Pure procedural synthesis for rotation clicks, laser pulses, and vault breach fanfares. No heavy external assets or slow CDN downloads.
  • Viral Reddit Community Growth: 1-click export of spoiler-free emoji grids (e.g. Wordle/Heist style) formatted specifically for Reddit markdown comment threads.

🛠️ Tech Stack & Standards

  • Platform: Reddit Developer Platform (Devvit v0.11+)
  • Frontend / Engine: HTML5 Canvas, Vanilla ES2022 JavaScript, WebAudio API
  • Backend / Persistence: Devvit Redis (@devvit/public-api)
  • Verification: Node.js 365-day seed solvability test suite (tests/test_daily_seeds.mjs)
  • Media Asset: 1920x1080 30fps MP4 gameplay demonstration (assets/demo_1080p.mp4)

🧪 Local Testing & Standalone Play

  1. Run 365-Day Solvability Test: bash node tests/test_daily_seeds.mjs
  2. Standalone Browser Play: Simply open webroot/index.html in Chrome, Safari, Edge, or Firefox. Works offline with 0 dependencies!

👤 Author

  • Developer: Trần Ngọc Quốc Khánh
  • GitHub: Khanhtnq (<[email protected]>)
  • Track: Best Daily Game ($15,000) / Devvit Interactive Posts

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