Very simple and very fun.
I will say sucking blood is a bit finicky, as I will press up at people and sometimes it works sometimes it doesn't. But using blood as a weapon against people that isn't a vampire is smart, since the limitation isn't "Lethal to all" just lethal.
I made it to the 45 second mark before the controls made it impossible to hit the dude behind me as I was trying to turn around.
You get an 8bit cookie