Playing as a zombie is certainly a fresh idea and fun to play. You did really nice job although some bacground music would be a nice touch that would make the gameplay even more complete and sometimes I did not feel stronger while in group as if I understand right, once the main player is hit, the game is over. For future I would just adjust it in a way that if someone from the group from zombies is alive, you still have chance to infect. But totally understand if this wasn´t the way you wanted to go ;) I had a great time with your game, thank you for that and Great job done!