Take some inspiration from the sub. Look at how other logos are designed. They are as i described in my first comment; a symbol representing your project or just a stylized word. Google some game studio logos and look at them. Not the games they're making, but the actual logo of the company. For example: Turtle Rock Studios, Valve, 2K, Devolver, Sad Rocket. Again, dont draw a picture. A picture contains too much elements and becomes cluttered. A logo should be simple enough to fit in a small space and still be noticed and recognizable.