I made a resource for Unity -- a shortcut so any 2D Rigidbody Collider will show up on a overlay that mimics the 84*48 pixel screen. There's text boxes that line up with the pixels that use the Ark SDF and EffortsPro fonts in the fontpack. An audio system is setup, too, so that if a sound effect plays, the music is turned off. Hope that's helpful and please let me know if I missed something or it's glitching.
https://msibrava.itch.io/nokia-mimic?secret=6ZnrdNHvyOfHJCr5qubuIiMYk
I polished it a little bit this morning -- some of the audio setting was untested. It's looking a little better now.