We used a simple pixelation shader (Youtube has plenty tutorials and if I'm not mistaken the Unity Store has one of those as well for free) between the camera and the game itself so things do look pixelated but at the same time the amount of pixelation does not follow the camera zoom. Then making things clearer when up close.
If you zoom in you can actually notice that all the art are simple vectors.
Thanks a lot for dedicating your time to review and comment we really appreciate it!