Thirteen Tombs of the Brilliant Dynasty

- Made slime/pendilums area simpler (added planks)
- Added 1 more secret; everyone is trying to look in there, so why waste efforts
- Tweaked rocks so Blood key secret area can be legitimately entered with tricky jumping

Very important update! I forgot to add that "object" while I aimed to do that "thing" initially

Spoiler: spoiler

*Those who played already can check behind exit portal