Thanks for the feedback.
Not sure if I can make all the keyboard presses do the same thing, but I'll look into it.
Was trying to have just the spacebar as my 1 button, but with how Unity WebGL games are setup, you do need to focus the game with a mouse click. I can show and free the mouse cursor, but thought that went against the 1 button rule. Will also try to make a standalone build, that way mouse input will not be needed, unless mouse input in addition to spacebar, does not violate the 1 button rule.
Thanks