Logic Lattice | HTML5 Puzzle Game

A complete, production-ready HTML5 logic-puzzle game built for commercial distribution. Zero external JavaScript dependencies. Runs on any modern browser straight from a static file host with no build step required.

Overview

Logic Lattice bundles three Sudoku variants on one shared 9×9 engine: Mathdoku Towers (bold-outlined cages that must satisfy a +, −, ×, or ÷ equation, with no repeated digit inside a cage), Consecutive Sudoku (classic Sudoku with dots marking every pair of neighboring cells whose final digits are consecutive), and Arrow Sum Sudoku (classic Sudoku where the digits along each arrow must add up to the circled digit at its start). Every puzzle is generated procedurally at play time — there is no bundled puzzle list. The game features Easy/Medium/Hard difficulty tiers plus a seeded Daily Challenge, five selectable board themes (each with its own fixed background image), an optional Cartoonic Mode visual style, a shared XP progression system with seven rank tiers, a local best-times leaderboard, an eight-achievement system, a configurable hint system, and a full sponsor/ad integration framework — all in a single self-contained HTML5 package.

About the Game

• Entry point is index.html — no build step, no CLI tools, no package manager required
• Pure vanilla HTML5, CSS3, and ES6+ JavaScript — zero libraries, zero frameworks
• Game engine and UI for all three puzzle modes are contained in a single IIFE in scripts/js/game.js
• There is no bundled puzzle file — Mathdoku Towers, Consecutive Sudoku, and Arrow Sum Sudoku boards are all generated algorithmically at runtime, for every difficulty tier
• All CSS lives in scripts/css/style.css; sponsor/ad placeholder in scripts/sponsor/sponsor-placeholder.html
• Ads are switched on or off from a single file: scripts/config/ads.js
• Five bundled background images, one per theme (scripts/images/bg-amber.webp, bg-jungle.webp, bg-obsidian.webp, bg-midnight.webp, bg-crimson.webp) and one favicon (favicon.jpg)
• Procedural Web Audio API sound engine — no audio files bundled
• All game state persisted to localStorage with graceful degradation when storage is unavailable
• Browser support check on boot — displays a dedicated “Browser Not Supported” screen if requirements are not met