SumDoku takes the logic puzzle you already know and adds one new rule: every row and column must not only avoid repeating numbers — it must also add up to the exact same total. Simple to learn, satisfying to master, and built as a single self-contained HTML5 file with zero build tools and zero dependencies.
✨ Key Features
3 difficulty levels — Easy (4×4), Medium (5×5), Hard (6×6)
Separate screens — Start Menu, How to Play, Settings, and Game, each with its own clean layout
In-game pause menu — Resume, Restart Level, Sound toggle, Home
Hint system — 3 free hints per round reveal hidden row/column sums, plus a rewarded-ad flow to earn more (simulated ad included, real ad SDK integration documented in one line)
Web Audio sound effects — every tap, placement, mistake, and win is a synthesized tone; no audio files to load
Win celebration — confetti animation and an animated win modal
One-tap social sharing — native mobile share sheet, X/Twitter, WhatsApp, Facebook, and copy-to-clipboard
Fully responsive — mobile-first layout that scales cleanly from small phones to desktop
Bold neobrutalist visual style — thick borders, offset shadows, bright accent colors, easy to re-theme via CSS variables
Single HTML5 file — drop it on any host, wrap it in Cordova/Capacitor, or embed it anywhere
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After registering and refilling your points balance you need to go to the product page and click Download for x points and Download button one by one. After that the download will start automatically via a direct link.
Please note, our site has a point system and we don't have any hidden or recurring fees, so you are purchasing the current version of the digital product without the option of a free update. If you need a product updates in the future, you can create ticket request update (not free update)
If you need help, please read the answers to popular questions on this page first: https://codegood.net/faq. To get any other help on the product you can create a support ticket on the site: in the main menu user.
Before making a purchase, please read the Terms and Conditions on this page: https://codegood.net/tos
All digital products are purchased without the possibility of free updates or support update. We do not provide any license keys or product support. Please first read the FAQ on this page: https://codegood.net/faq
Please note, our site has a point system and we don't have any hidden or recurring fees, so you are purchasing the current version of the digital product without the option of a free update. If you need a product updates in the future, you can always download them using your point balance.
Please note that any digital products presented on the website do not contain malicious code, viruses or advertising. You buy the original files from the developers. We do not sell any products downloaded from other sites.
You can download the product after the purchase by a direct link on this page.



