Controls:
Move with WASD
Left click interact/grab resources
Right click place buildings
1, 2 and 3 keys to change the buildings you can place
The first building does damage to 1 enemy cost 4 stone 4 wood
The second heals the player 6 stone 10 wood
The third does AOE damage 8 stone 10 wood
Each time you activate a stone key waves of enemies will try to stop you, when you activated all 5 then the portal begins to open.