Changes

The basic idea of the compromise is to design the p5js app for a 16: 9 portrait format. This saves you the work of having to develop an adaptive design. The remaining area on the desktop computer is filled with a background pattern. The full display height is used on the mobile phone, so you can easily see the app full screen if you push the URL bar up a bit. (Unfortunately, This compromise is necessary because unfortunately the p5js full screen command does not work on iOS devices.)