Now that's what I call a take on the trolley problem. Visuals are really nice. I wasn't expecting the brain eaters and zombies, that was cool the way it changed the problem from save the most lives to maybe take out a killer cause that'll actually save more lives. I felt like the extra paths weren't really necessary, I guess that comes down to me not being bothered to experiment but there was always a better option (even if it wasn't clear the first time) and those best options lead me down the path. I guess for maximum points you could kill more people now to later kill less people.
Anyways, really nice looking game, nice simple gameplay and an interesting idea. Nice work :)