When creating level 4 I realized that I wouldn't have enough time too many levels, so I wanted to make it more difficult then the others. A fun fact is that the square in that level is completely optional as you can use the player to tilt the platform instead. I added the square to maybe help reduce the difficulty a bit. The UI scaling was defiantly something I did spend too much time on. There is a full screen button in the bottom right in the webgl file to help negate some of the issues but some of the UI is still cut of.