Cheats at Marathons by Not Breathing

Edward loves three things: Running. Blood. And Running. Can you balance the slowdown of attacking fellow racers with the boost their blood gives you?!? CAN YOU?! Chase your fellow racers: As you run, your blood energy will decrease, forcing you to FEED ON YOUR FELLOW RUNNERS. Run up to them and press Space -- after feeding, sprint on, young vampire, sprint on. Only one (long) question remains: Can YOU balance your blood levels, speed boosts, hunger, and feeding slowdowns well enough to win? Well...