EvoWars.io is a multiplayer survivor io game based on the concept of evolution.
Fight! Kill! Evolve!
Move your mouse cursor around to move your character.
Left mouse button - attack
Right mouse button - speed boost (uses experience)
If you are still small, try to either focus on collectible orbs or get close to opponents very fast with speed boost.
If you are already big, try to not miss any hit, otherwise small enemy can appear next to you very fast.