Chrome Offline tRex game nightmode

trex-nightmode.js

'use strict';

var tRex = Runner.instance_.tRex;
tRex.direction = 1;

var move = function move() {
	tRex.xPos = Math.max(Math.min(tRex.xPos + tRex.direction * 5, 500), 0);
};

window.onkeydown = function (e) {
	if (e.key === 'ArrowRight') tRex.direction = 1;
	if (e.key === 'ArrowLeft') tRex.direction = -1;
};

var nightmode = function nightmode() {
	Runner.instance_.config.INVERT_DISTANCE = 0;
	Runner.instance_.config.MAX_OBSTACLE_LENGTH = 4;
	Runner.instance_.config.SPEED = 13;
	setInterval(move, 25);
};

nightmode();

//Open Developer Console (f12) and enter this code. Then, the nightmode will be enabled.