Scrolling goes off screen
I am using an iPhone XR with iOS 15.3.1 and Safari (with WebGL 2.0 activated), and scrolling in anything that isn't the game canvas allows it to scroll beyond the screen borders, making the bottom bar to apear in the middle of the screen, and sometimes completely off. I tried with an Android and it worked fine (though it was a really underpowered one at 5 fps)
Video of it happening