Thanks for the reply!
Try to go to the right edge of the screen, then run towards the character on the left and use it's body like a ramp to propell yourself into the air. If you strafe around a little and jump you can make it over the characters head.
It was a little foolish to assume people would take up the controls very fast without a tutorial. When I playtested every section I already had experience with the controls of course.
You can do it :D!