Here is a pic with my game with a directional light that has cast shadows disable:
Here is an other pic with the same light but with cast shadows enable:
i dont know what is going on. Can you help me to make my game look better??? 
Hello Faquina,
I think it’s because of orthographic camera, What happens when you change it to perspective camera type?
Hello Faquina,
Do not forget to build lighting too if its static or stationay. And try it with movable light too. Hope this helps, thanks.