Guides
Developer guides
Practical, no-hype writing on publishing, monetizing, and building HTML5 games — for developers, not players.
Why HTML5 Game Submissions Get Rejected (And How to Avoid It)
The recurring reasons a browser game fails review across most portals — rights, ad conflicts, broken loading — and how to catch them before you submit.
Hosted Build vs. External URL: Which Should You Submit?
Two different ways to get an HTML5 game onto a portal — uploading a ZIP for them to host, or pointing at a URL you control. The tradeoffs aren't obvious until something breaks.
Optimizing HTML5 Game Load Time for Portal Submissions
A slow first load loses players (and reviewers) before they ever see your game. The concrete things that actually move load time, in rough order of impact.
Rewarded vs. Interstitial Ads: Where to Actually Place Them
The two most common HTML5 ad formats behave very differently depending on where in the game they show up. Placement matters more than which format you pick.
Where to Publish Your HTML5 Games: A Realistic List of Platforms
Every portal that will actually take an HTML5 submission in 2026, what each one is good for, and an honest read on where PlayKovo fits in that list.
HTML5 Game Traffic, Volume, and Revenue: What Actually Drives Earnings
Pageviews aren't revenue. Here's what actually moves the number on a browser game's ad earnings — and why most single games don't make much on their own.
HTML5 Game Engines: Which One Should You Actually Use?
Construct, GDevelop, Godot, Phaser, or Unity WebGL — a straight comparison focused on the thing that matters most for browser portals: how fast your build actually loads.