Any way to change the keys used to move ?
W/S makes sense on a QWERTY keyboard, but on some other layouts like AZERTY the W key is under the S key, so it's really difficult to play like that.
Why not use up/down arrows ?
That's something we would like to change in the next update, the main reason why we didn't use up and down however is due to worries of them scrolling the page for the web gl version.
However at the least having them as an option would be better.