Nice entry, though I also feel like the link to the theme of the gamejam is a little weak. I didn't finish it, but played for a little while. Here is something of note though:
In general, i had a few parts where moving the king felt a bit... off. Fall speed feels a little too fast, your jump just a little too short. Moving platforms only start moving when you walk on a specific part of them, etc. Usually, these are minor inconvenient things that aren't that bad, but they add up in some levels, leading to them becoming extremely frustrating.
I remember one level had a platform you can only reach on the literal peak of your jump, giving the player 0 leniency. If feel like failing such a jump is just plain frustrating instead of challenging.
Overall, these issues are solved by the fact that you respawn quickly, giving the player little time to feel frustrated. It sometimes felt a bit like a rage game, which isn't bad. Just be aware that often, in a normal game, such mechanics end up more frustrating to players than fun.