You can also jump with "w". I had dash set to shift in the past, but some of my friends complained, because of some windows function, where a pop up appears if you press shift too often. In retrospect I would like to remap the keys, but its too late now (its mid competition and it feels like cheating to make such changes after the deadline).
I think remapping the jump button to "space", the dash button to "right click" and the heal button to "f" would be way better.
Also you can hold "w" longer to jump higher.