There's nothing better than an adrenaline rush. Imagine the adrenaline rush you would get if you were forced to run as fast as you could and kill enemies while you did just that? Here is your chance, because if you fall behind, you will die. Use your mouse to aim and the left click to shoot. Use "A" and "D" to move left and right, respectively. Use your space bar or "W" to jump. If you hit the jump button twice, you will double-jump. It may seem easy, but it's harder than you might think.