Essence

After each death a part of the gained worm's mass is tranformed into essence with a proportion of 500 to 1. All authorized players can gain essence.
If after a battle the worm's length was less than 500, the player will get no essence.
The essence is used for buying artefacts in the shop.
The registered users can buy essence additionally, pressing the button with the icon and the number of essence in the top left corner of the main menu.