Nice puzzle game and a fun story too. I like the idea but I wish the puzzle mechanics were more dynamic, other than just teleport and block. Just a suggestion off the top of my head, in the levels that show Millie, maybe you add cat food and the roach will push it in place so that Millie runs straight towards it and removes all the barricades in the way. But I really like how you introduced a mechanics and gave an easy level understand it, that the proper strategy for puzzle games.
The Rat King jumpscares were perfect though! :O
Great work.