Watch the creature survive and make more creatures. The shards act like points. If the creature didn't consume any shard for a few or more seconds, it will die. If the creature has consumed 1 shard, it will survive and the shard consumed will subtract by 1. If the creature has consumed 2 or more shards, it will go to the shrine (the shrine in the middle) and make a new creature and the shards will be subtracted by 2. There are advanced options for you to control the creatures by pressing E.