so I ended up changing the dash button from K to right shift to try to use the arrow keys only when I needed to dash up and right (which is a really awful setup but I was desperate to play this awesome game), but as it turns out all the directions work just fine with WASD when dash is right shift? I did try downloading the openGL version to see if that would help (it didn't) so I have no idea if this works on the other Windows version, but if you're having this problem try setting dash to a different button and see if it works I guess