Sorry for the late reply, I somehow missed notifications from itch for like two weeks. Most of the scenes in the game don't have art at the moment. There are still somewhere between 40-50 that do have art, but there's at least 200 scenes in the game overall, so many don't. The scene reviewer includes most of the scenes with art though, so after you finish a dungeon you can check that to make sure you haven't missed any scenes with art. As for fullscreen, F4 should do that, but it's just going to stretch out the screen and any images on it, so I don't really recommend it.