SumDoku | HTML5 Game

Description

SumDoku | HTML5 Game — A Fresh Twist on Sudoku

SumDoku is a captivating HTML5 logic puzzle game that blends familiar Sudoku mechanics with a simple but clever twist: instead of matching symbols alone, players match every row and column to the same target sum. The result is a brain-teasing, easy-to-pick-up puzzle that stays challenging across many rounds.

How the Game Works

Each grid presents numbers to place so that every row and every column adds up to the required sum. The bold, neobrutalist visual style — thick borders, offset shadows and a clean layout — keeps the numbers clear and the gameplay focused, while the mobile-first design makes it comfortable to play on phones, tablets and desktops.

Key Features

• Three difficulty levels: Easy (4×4), Medium (5×5) and Hard (6×6) grids
• Dedicated Start Menu, How to Play, Settings and Game screens
• In-game pause menu with Resume, Restart Level, Sound toggle and Home options
• Hint system with three free hints per round, revealing hidden row and column sums, plus an optional rewarded option
• Synthesized Web Audio sound effects for taps, placements, mistakes and wins
• Confetti animation and animated win modal when a puzzle is completed
• Social sharing through native mobile share sheets, X/Twitter, WhatsApp and more
• Responsive, mobile-first design for a wide range of devices
• Single HTML5 file delivery for fast loading and simple setup

What Is Included

The game is delivered as a single HTML5 file, together with documentation for setup and customization and a changelog recording updates. It is built with HTML5, CSS3 and ES6 JavaScript for compatibility with major web browsers.

Who Is It For?

SumDoku is ideal for website owners who want engaging puzzle content for visitors, game developers looking for a solid logic-puzzle codebase to build on, and educators who want a fun, interactive way to practise logic and problem-solving skills. Simply place the single HTML5 file on your site to get started.