It looks great, think it needs some sound effects. The mechanics are interesting however I found clicking and dragging off the arrows to be buggy. It was too frustrating so I gave up playing. Still, definitely think there is a game that could be made from this demo.
Viewing post in NecroMansion jam comments
At the start of your round, the zombies have random directions drawn. I could usually set new directions except in some cases where I just couldn't change anything. There were also times with the wizard where I would click on him to draw off a direction and it either wouldn't work or only after several attempts.