Decide how the player starts. Is there a clear play button? Does the page explain controls? Can someone return to the instructions without losing progress? A loading state should communicate useful progress or waiting information rather than appear frozen.
Check focus and input
Keyboard actions can interact with browser or page behavior. Touch input can conflict with scrolling. Test the intended controls in the actual embedding page and supported browsers. Avoid assuming that a desktop pointer test covers phones and tablets.
Consider what happens when the tab loses focus or the window changes size. The appropriate behavior may include pausing, preserving state, or showing a clear resume action. Audio and storage behavior should be checked on the target browsers rather than inferred from one successful run.
Keep the surrounding task clear
If the game supports a learning or brand purpose, explain the context and next step without crowding the play area. Provide appropriate alternatives or support routes when the game cannot load.
Record the tested browser and device set and keep unsupported combinations explicit. A browser build can make access convenient, but it does not establish universal compatibility. The page and the game need to be reviewed as one experience.