Agariocom Direct

The game places players in a petri dish as a microscopic cell. The primary objective is simple: consume smaller mass (randomly generated pellets or other players) to grow larger while avoiding consumption by those bigger than you. Essential Controls and Mechanics Agar.io: The Game's in the Name - Cameron Lindsey, 2019

: You can split your cell in half to launch a portion of your mass forward. This is the primary way to "split-kill" smaller players who are otherwise too fast to catch, or to make a quick escape when being chased. agariocom

There are two common interpretations of "deep text" in this context: The game places players in a petri dish