Thanks for submitting the issue with the key. I'm working on Mac and tried with safari, firefox and Vivaldi (which is chrome based). Interesting that some specific browser version cause some issue. Sorry about that.
Concerning the usual WASD keys, I often avoid it at first because I have an AZERTY keyboard : W is Z on my keyboard, and A is Q ;-) so it's difficult for me to play test if I develop first with WASD. Then if I rememberer or have time left, I add it at the end :-P
BTW, I'm using Godot when I develop for trijam ;-) Their is maybe an easy way to had more input keys ... I should investigate.