The following app contains mostly functionality tests of different Kotlin features including coroutines and mediaplayer.
App includes menu with three options:
Game starts with a 4-element sequence and player must press buttons in the same order. Each level sequence adds an another random element and if player press a wrong button then the game ends.
Player can just press any button in free mode.
Rules and info about developer.
App also contains info about player's level record that is saved after app is closed.