These are really cool! Will also add a version of these mnemonics to the Korean guide I have been writing: https://tolearnkorean.com/

Learning the Korean alphabet (Hangul) can be done quite quickly, it's only about as many "letters" as the English alphabet!

Remembering the words is a bit more difficult though, especially if you don't know a similar language. Have been using Anki and my own app for that: https://game.tolearnkorean.com/