Oh now I see it in the controls....
Was already weird enough that you make the game mvement with wasd but putting the jump key to the up arrow.
weird choice of controls but whatever.
will try that run button asap, see you until I get stuck the next time :-)
There's a reason I added fully customizable controls, everyone prefers their setup differently, and this was anyone can play however they like. One thing I could try to do is add a sign of some sort at the beginning of the game to show the player's "current button mapping" or something like that. Like a list of all the actions and what button triggers them.