Okay so get the mechanics of multiplying the soul, but the first thing the game needs is goal.
Try adding a black cell, that is created randomly by the game. Maybe add a timer and give the goal to the player to keep the amount of green cells higher than black before the timer runs out.
Right now it does not feel like a game, But add a Goal to the player, Improve the art, and add the click sound effect to make the game more fun.
Also do check out our game Separated Shadows , and let me know your review. Thanks in advance.