I could try to find out anything about the .lev format. We actually know what's stored inside (a tileset image, a color palette, multiple layers of tiles, events, some settings...), but (as far as I know?) we don't know anything about how things are stored in there. I'm actually quite optimistic that I could get an overall view of the structure (and possibly already more than just that) without too much difficulties if my expectations are right.
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