The grid of panels were actually the result of playing with cameras and render textures in Unity. There's a grid of cameras in the scene looking at the player, and each camera renders to an image panel in the UI canvas. So there is no real "player camera" in the game, just image panels. I then made a script to move or play with the cameras or panels depending on which room you end up in. Probably not the most resource-efficient way of doing it, but I had fun experimenting!
Thanks for playing and the feedback!