I'm trying to test a HTML5-based game in my iPhone's browser that uses tilt controls/the phone's accelerometer. However, it doesn't appear to be sensing anything. And when I look for other games on itch.io that run in your mobile browser and use the phone's accelerometer, I find nothing.

Is this just not possible on itch.io? I've seen other examples of this working, but the games were uploaded directly to the person's website.