first question: is it allowed to have an overlay/effect that adds to the immersion (eg. translucent scratch marks on the screen)

second question: is it allowed to have a ghosting effect where the pixels fade out when they are off (similar to a real Nokia screen)

oh and also subtle screen glare

As per the FAQ anything you want to do to make it as accurate to, or simulate the real phone, is okay but the base resolution and game space should still be 84 x 48 or 48 x 84 pixels.