Interesting concept for a 2 player game -- though I did manage to break it quickly; one player flew off the field, and I drove the puck into a corner that I could not get it out of. I think maybe you could use something like cinemachine to dynamically zoom the camera in and out whilst keep both players on screen. And I think there is nothing wrong with using simple shading and primitives for your game, but, I think you can use something like post-processes effects to elevate the look. Also some sounds would also be nice. Definitely think it's an interesting concept worth putting more time into.