Where did the post go?

FYI, this was the top result on Google for “warlock’s tower walkthrough”, but for some reason this, and every other walkthrough I’ve read, all omit the levels not on the critical path of “100% achievements”, so I’ll try to include and/or fix these “non-essential challenges”:

House of Horrors - Secret Level 3
2U R - U 2L U - 2L D - 3L - 2R U - 2U L - L U 2L U - 2R L - 3U - U

Critter Gang - Secret Level 4
R U L 4R - U 4L U L - 2L D - D L R U R - R U 2L - U 2R D - R 2L R L 2R U - R 2U - 2U