Finished! Just have to beat the big baddie now ...

There's no clues that are challenge to decipher in this level, but a lot of the hearts are tough to get to. Lots easier than the Mill though, in my opinion.

Soul Jars:
This was really tough. There's two on the left, two in the middle and two on the right. I did the ones on the right first, since the one in the center of the swirling spiral thing is the hardest to get; if I died, no harm done. It's difficult coming back, but you can dodge hard parts by jumping down to platforms below you. Then I did the two in the rings (center), and saved the ones on the left for last. There's one on a pillar thing that seems impossible to jump up to: you have to jump against the wall at an angle, then off the pillar, then do a flip kick to get on top - tricky. The heart will appear in the center of the map, where the ring of shards is.

100's All That Matters:
Reading other posts below, I was led to believe that there's just over a 100 of them so you have to get nearly every single one on the map, which would be extremely difficult. I found there was more than enough to go around, however. After doing the jars, this was fairly easy in comparison; do the jars first, and you'll have the skills you need to do this one. If you see a really dangerous shard to get to, just leave it; there'll be an easier one somewhere else.