Control a square with the ability to jump, move, and most importantly: split (hence the name Square Split).
Obstacles come at you with increasing complexity and speed, and you have to try to stay away from the left side of the screen to survive
Some obstacles will require you to split your square in half several times and shoot yourself across the level to survive. You can then recombine your smaller parts later and prepare for the next obstacle
There are also skins available in game that are earned by getting high scores!