var scoreboard = new Scoreboard();
scoreboard.countdown(60);
scoreboard.score();
scoreboard.help(
'Arrow Keys to Move. ' +
'Watch for the shaking tree.' +
'Run into the odd tree before time runs out!'
);
var game_over = false;
scoreboard.onTimeExpired(function() {
scoreboard.message("Game Over!");
game_over = true;
});