The fifth survivor is really a dick move. Also the controls are really horrible. I'm playing on a german keyboard. It's horrible to use "Z" together with the rest. Please add "Y" for the same as "Z". Also the jumping doesn't feel right. Seems like you can't jump anymore once halve of the player is over an edge. But you know, that's normally the point where you press jump as you run over the edge. Here the player just falls down.
So, yea, all in all not really fun to play.