I am in the same boat. The other problem in Steam is that you cannot request a refund after a certain amount of time playing and am well past that when running into this 'bug'..pardon the pun. I absolutely LOVED Grounded 1 and have been looking forward to this for so long and sincerely hope that the buggy controls get their own keybind section. Please fix this ASAP.
Long live ESDF movement!! (seriously, this is game design 101.. never hard code anything to a keybind)