PlayKovo field notes
Useful answers for game developers and website publishers.
Testing notes, embed instructions, publishing decisions, and lessons from operating an HTML5 game catalog.
Why Your Web Game Lags on Phones: Pixel Ratio, Shadows and Draw Calls
A game that runs at 60 FPS on a laptop and stutters on a mid-range phone usually has one of four causes. How to measure, and the fixes that pay off first.
Holding 60 FPS in Mobile Browsers: Frame Budget, Garbage Collection and Texture Memory
Where the 16.7 ms goes, why random hitches appear every few seconds, and how texture size becomes a memory problem long before it becomes a speed problem.
Embedding HTML5 Games Without Hurting Your Core Web Vitals
Reserve the space, load the frame late and keep one active game per page. A practical checklist for publishers who care about LCP, CLS and INP.
AdSense on a Game Site: What a Reviewer Actually Sees
A game page is mostly someone else's work in a frame. Real descriptions, honest numbers and a stated reason for every pick are what give a reviewer something to approve.
One Game, Many Sites: How HTML5 Game Distribution Works
Three ways to get a game onto other people's websites, how GameMonetize, Playgama and PlayKovo each approach it, and what a website owner can pull from our catalog today.
Making HTML5 Games With AI: Which Model to Use and How to Prompt It
Claude and ChatGPT Codex can both build a playable browser game in an afternoon. Whether it is a good game depends mostly on the brief you give them and how you test.
How to Prepare an HTML5 Game to Run Inside a Sandboxed iframe
Portals and partner sites load games inside sandboxed iframes with a restricted permission list. A checklist of what that breaks and how to test your build for it.
Why Game Websites Reject Your Game: What "Doesn't Meet Our Quality Standards" Really Means
A portal's generic rejection rarely explains itself. What reviewers actually look at, why a rejected game can be better than ones already listed, and how PlayKovo reviews every submission against the same standard.
Free HTML5 Games for Your Website: A Licensing Checklist
How to verify embed permission, advertising terms, branding rules, and removal procedures before publishing a free game on your site.
How to Choose Games for Your Website's Audience
A selection method based on visitor intent, session length, device mix, controls, and editorial fit rather than filling a page with random games.
How to Embed an HTML5 Game in WordPress Without Breaking Mobile
A WordPress-focused setup for custom HTML blocks, responsive iframe sizing, fullscreen permission, caching, and theme conflicts.
Popular HTML5 Games to Embed: How to Build a Defensible Shortlist
Use recent starts, repeat sessions, device support, and page fit to select popular embeds instead of copying a permanent top-ten list.
How to Build a Games Section for an Existing Website
Plan a useful game landing page, category structure, cards, detail pages, feeds, and removal workflow before importing a large catalog.
Mobile-Friendly Embedded Games: Portrait, Landscape, and Touch
Test orientation, viewport height, safe areas, two-thumb controls, fullscreen, and browser chrome before calling an embedded game mobile-ready.
How to Test an HTML5 IO Game Before Submitting It to a Portal
Release tests that catch problems a working preview tab misses, including a two-finger input test and a useful bug-report format.
How to Write an HTML5 Game Description and Controls for a Portal
A worked Turf.io example showing how to describe the core loop, loss condition, controls, multiplayer status, and save behavior.
Adding an HTML5 Game to a Website with an iframe
A step-by-step PlayKovo embed setup covering responsive sizing, iframe permissions, Content Security Policy, and mobile testing.
Iframe Embeds and JSON Feeds for a Website Game Catalog
Use individual iframe codes for a small curated page and a JSON or XML feed for a catalog that must update automatically.
A Checklist for Third-Party HTML5 Game Embeds
Review permission to publish, iframe origin, advertising behavior, privacy terms, performance, mobile support, and removal procedures.
Measuring the Effect of Embedded Games on a Website
Set up a controlled comparison before claiming a lift in engaged time, return visits, page speed, or advertising revenue.
Five HTML5 Game Embed Problems and Their Fixes
Diagnose responsive sizing, iframe permissions, Content Security Policy, stale game URLs, and missing touch support.
Versioning an HTML5 Game Without Breaking Player Saves
A safe update strategy for localStorage, IndexedDB, cached builds, and save-data migrations when players may return months after their last session.
Comparing Ad Networks for an HTML5 Game
Compare direct networks, mediation, portal SDKs, geographic fill, payment terms, consent requirements, and maintenance cost.
When Ad Mediation Makes Sense for an HTML5 Game
Use fill rate, impression volume, regional coverage, and maintenance cost to decide whether a second network is justified.
Reading Retention and Session Data for an HTML5 Game
Use D1 and D7 return rates, session distribution, first-session exits, and version comparisons to find where players leave.
Responsive Layouts for HTML5 Games
Choose a scaling model, protect the playable area, account for safe zones, and test real portrait and landscape viewports.
Better Titles and Thumbnails for HTML5 Games
How to show the playable action at small sizes, write a specific title, and test discovery assets without misleading players.
GDPR, COPPA, and Ad Consent Basics for HTML5 Game Developers
A starting checklist for data collection, consent, child-directed content, third-party SDKs, and the questions to raise with a qualified adviser.
Designing Touch Controls for Mobile HTML5 Games
Plan touch targets, gesture conflicts, safe areas, orientation, feedback, and two-thumb play before adapting a mouse interface.
Localizing an HTML5 Game for Turkish Players
A Turkish localization workflow covering player-facing text, dotted and dotless I, font coverage, layout expansion, screenshots, and store copy.
Marketing Your Browser Game Without a Budget
A no-budget release plan built around a clear game page, short clips, community outreach, portal updates, and useful post-launch notes.
Accessibility Checks for Small HTML5 Games
Low-cost improvements for keyboard access, readable text, color contrast, reduced motion, audio cues, and remappable controls.
A Pre-Submission Playtest for HTML5 Games
A focused playtest for onboarding, controls, failure states, restart flow, mobile input, saves, and the first ten minutes of play.
Why HTML5 Game Submissions Fail Review
A pre-submission review of asset rights, advertising conflicts, loading failures, controls, and mobile behavior.
Hosted ZIP or External URL: Choosing a Submission Format
Compare portal-hosted ZIP builds with developer-hosted URLs across updates, uptime, caching, security headers, and support work.
Optimizing HTML5 Game Load Time for Portal Submissions
A prioritized load-time checklist covering build size, compression, initial asset requests, fonts, audio, caching, and first interaction.
Rewarded and Interstitial Ads in HTML5 Games
Choose ad moments around player intent: optional rewards for explicit choices and interstitials only at clear breaks in play.
Where to Publish an HTML5 Game in 2026
A comparison of active HTML5 portals, their submission routes, catalog strengths, and the role PlayKovo can play in a wider release plan.
How HTML5 Game Traffic Turns Into Revenue
A practical look at playable sessions, ad opportunities, fill rate, retention, and why a catalog usually earns more reliably than one release.
Choosing an Engine for an HTML5 Portal Game
Construct, GDevelop, Godot, Phaser, and Unity WebGL compared by export size, startup time, 2D and 3D support, and workflow.