The teleportation could only go in the directions, and would always bring you to the other side of the wall and pressed against it. I can see why someone who didn't code it to do that would have some trouble without an indicator, though. I noticed the score being cut off, but I assumed everyone would play in fullscreen, and it wasn't cut off (for me) in fullscreen.
Building for WebGL introduced a myriad of bugs not present in the offline build, and I didn't have the time or energy to try to fix them.