Gameplay featuring all 24 levels completed.
Every single level was beaten once only, on brilliant rating(that doesn't necessarily mean that every level in the video was beaten with brilliant on the first try, I simply restarted whenever an enemy grabbed a gem). This means that there was no xp farming involved by retrying a single level multiple times. This part in particular shows levels 16-24(levels 16-18 are night mode-only, you can see the day variants in part 1).
I might write a document with strategies for each specific level, but no promises. I don't know how much there is to actually write.
Video features day level 23 beaten first try and then an epic fail in level 24 right after.