HTML5 game publishing
Interface Details That Make a PlayKovo Game Feel Finished
Touch targets, instant feedback, readable text, clean pause and resume, sound, keyboard focus and the first ten seconds, with a short test table for frame and WebView.
A game can pass review and still feel cheap. Often the reason is not graphics but small interface gaps: a button that does not react, a tap that does not register, text too small to read on a phone. PlayKovo runs your game in a frame on its site and inside its app, so the same build has to work in both. This post lists the interface details that matter most and how to test them.
Your game lives in a frame
On the website the game runs inside an iframe, sized to the player area. In the PlayKovo app it runs in a WebView on a phone. That means your layout must respond to the space it is given, not to a fixed window size you assumed. Read declaring orientation and device support for the orientation side.
Touch targets
A fingertip is much larger than a mouse pointer. As a rule of thumb used across the industry, aim for tappable areas of at least 44 CSS pixels in each direction, with space between neighbouring buttons. The key point is not the exact number; it is that you should test on a real phone, not a desktop window shrunk to phone width. Check:
- Buttons near the edge of the screen. Edges are hard to hit and may be covered by a phone's gesture area.
- Pause and menu icons. Many games make them too small.
- Two buttons close together, such as "Retry" and "Menu".
Give instant feedback
A tap should change something on the screen within a blink: a colour change, a sound, a small movement. Without feedback, players tap again and trigger the action twice. This is especially important for ad buttons, where a double tap could send two requests. See one ad request per player action.
Text that can be read
- Keep body text at a size you can read on a phone held at arm's length.
- Use strong contrast between text and background.
- Do not put important text over busy art without a backing shape.
- Test with the brightness lowered and outdoors if you can; screens in sunlight wash out low-contrast colours.
Respect the pause
A phone call, a notification or a swipe to another app should not ruin a run. The platform pauses your game in several cases, such as when the tab is hidden or the app is in the background. If you subscribe to those events, you must really stop; see pause, resume and mute. Also give the player a visible way to pause, and a way back that does not drop them into danger at once. A short countdown after resume is kind.
Sound
- Do not start loud music at full volume. Start moderate.
- Follow the platform's mute button and keep your own toggle.
- Do not rely on sound to convey essential information. Many people play with the sound off.
Keyboard and mouse
On desktop, support both the common key layouts. Games that use the arrow keys and WASD both are more comfortable. Do not capture keys that the browser needs unless the game requires it. Make sure that clicking inside the game gives it keyboard focus, and avoid page scrolling when the player presses Space or the arrows.
The first ten seconds
Most players decide in the first ten seconds. By then they should know the goal and have done something. Skip long splash screens and unskippable intros. Put the Play button where the thumb or the mouse already is.
Test list
| Test | Pass if |
|---|---|
| Phone in portrait and landscape | Nothing is cut off; the declared orientation is used |
| Small phone | Buttons are reachable with one hand |
| Sound off | The game is still understandable |
| Switch to another app and back | The game is paused and resumes cleanly |
| Slow network | Loading shows progress |
| Keyboard only on desktop | All actions are reachable |
These checks overlap with the portal's checklist; see the review checklist. They take about twenty minutes, and a game that passes them feels much more finished.


