[Ravengenocide]

You could run something like this in the console:

    window.addEventListener("keydown", function(e) {
        // space and arrow keys
        if([32, 37, 38, 39, 40].indexOf(e.keyCode) > -1) {
            e.preventDefault();
        }
    }, false);

That will prevent the scrolling when pressing the arrow keys. It's of course not a perfect solution, and something more robust would be to check if a game is currently running and so on, but it works as a quick hack.