This WIP completes the first world. A lot of FatRatKnight's ideas have been reused, as well as a few of my own.
Gem drops are predictable but difficult to really manipulate, so I occasionally have to delay myself by some frames to get good RNG in that regard. I probably could have killed one extra fly with magic in the first Underground Castle visit and saved about 16 frames. In Leo's paintings, the Magician Soul was in a bad alignment, so killing the column of brick enemies was slow; but there was nothing I could do to prevent that...