Can you add custom level music (when playing it) and custom poster image (for something *special*)?
And move setting having in between numbers (like 6,8 5,5)?
1) No. (Since the level consists of a single JSON file, and the idea of level packs fell through.)
2) No, because framework using int. Changing the system from using `ints` to `floats` might be difficult, and I don't want to work on that.
