You must survive 21 waves.
Everytime you press the start button you need to survive 3 waves
before you can go back to the buy zone.
Every 3 waves you have 2 points (currency) you can spend on armor,
weapon, potion, food, TnT (place them on bedrock to activate) and
a special weapon (cost 2 points and can be purchased once you reach waves 12).
Weapon, armor and potion are randoms when you buy them.
The game become harder as you advances go through the waves.
Rewards if you can survive 21 waves :)
