Thanks for your comment! :)
That's true, but the up arrow thing only happens because it's in the Jam and a Jam banner is unexpectedly displayed at the top.
Yes Shift is a little odd, I changed it in the last minute when I saw Ctrl + Arrows is back and forward in Chrome & Opera. In Firefox, it's Alt + Arrows, and there's SPACE to scroll down! But only WASD I don't like that much for right-handers...