I really enjoyed this escalating mini-episode. There's one or two slightly broken triggers in the final map for me (I get the text "exit_rune_2" and so on, rather than whatever is supposed to be printed, and one of the sequence-of-buttons-with-monsters triggers seemed to not work on skill 0 [I suspect because it doesn't trigger one one of the kills you need to progress it]), but that's only a small detraction from the ambition and design in the map as a whole.
In general, I quite liked these jumping puzzles - which is something from someone who generally has a low-tolerance for them - with only one in the final map being really annoying because of the abundance of scrags spawned in as well.
Secrets are also fun - I found about 75% of them, but I wasn't combing the entirety of each map for them after clearing them, just picking them up as I went.