I like the idea of working together toward an objective only for your teammates to turn on you. I think that it could be expanded to flesh out the objectives and level design a bit. My main criticism is that the lag between clicking and actually swinging the pickaxe is too long and the enemy knockback is too strong. When I was fighting I spent so much time in the air and couldn't actually reach the enemies to hit them. I did it eventually tho haha Good job!