Fullscreen and mobile browser play

Mobile expectations

Landscape usually gives the game more room. Browser toolbars can change the visible area after the game starts, so the client may need a moment to resize.

Touch and fullscreen

Fullscreen often requires a direct user gesture. Tap the page when prompted, wait for the game view, and use the site controls if the screen needs to resize. iPhone and Android browsers handle fullscreen differently, so exact behavior can vary.

Common fixes

If the game appears in a corner, leave fullscreen, rotate once, and enter fullscreen again. If touch positions feel offset, refresh after rotating and avoid switching tabs during launch.

Related pages

Why mobile can resize strangely

Mobile browsers change the viewport when the address bar hides, when the keyboard opens, and when orientation changes. The game has to fit inside that changing space. That is why a session can look correct at launch and then shift after rotating or leaving fullscreen.

If the picture is small in a corner, the page usually needs a fresh size measurement. Leaving fullscreen and entering it again after the game is visible often fixes that.

• Launch in landscape when possible.
• Wait until the game is visible before toggling fullscreen repeatedly.
• Avoid dragging browser UI while the game is starting.

When to switch devices

Phones, tablets, car browsers, smart displays, and unusual embedded browsers may behave differently from desktop browsers. If touch input keeps missing or the screen flickers after multiple refreshes, desktop is the better troubleshooting baseline.

Step by step mobile sizing fix

Use this order when the picture is offset, small, or stuck in a corner. It gives the browser a chance to recalculate the visible game area.

• Rotate to landscape.
• Wait until the game is visible.
• Leave fullscreen if it is already active.
• Wait one second.
• Enter fullscreen from the site control or prompt.
• Avoid dragging browser chrome while the new run is loading.

Common mobile mistakes

Changing orientation while the runtime is still starting can leave the game with an old size. Dragging the page, opening the keyboard, or switching apps during launch can also change the viewport while the game is measuring it.

Some embedded browsers do not support fullscreen the same way a normal phone browser does. If a device has a custom browser shell, results can vary.

Honest mobile limits

Mobile support is more fragile than desktop support because the browser toolbar, safe areas, pixel ratio, and touch mapping can change at runtime. The site can resize and recover many cases, but a normal desktop browser remains the best baseline for serious troubleshooting.

When the screen changes after launch

A mobile browser can report one size during the loader and a different size once the address bar hides. That can make the first frame look correct and the next screen look offset. The fix is to resize after the game is visible, not while the loader is still preparing files.

If the game becomes blurry after resizing, report the device pixel ratio if you know it, or send the phone model and browser. Quality problems and touch offset problems can come from different sizing values.