I’m a big fan of logic puzzle games, and Theseus and the Minotaur (https://en.wikipedia.org/wiki/Theseus_and_the_Minotaur) is one of the best I’ve seen.
Mazeplex (https://play.google.com/store/apps/details?id=com.invariantl...) is based on the core mechanics of that game (player moves once, then the monster moves twice with a known algorithm), and I’ve added more elements (like a teleport and different types of monsters.
I built it with only native Android components (no game engine such as Unity) and wrote it in Kotlin.
It was a fun project to work on, and generating the levels was the most challenging task.