Got all except the Idle game and Grim Keeper in-game achievements with 1 hour of active game play + sleeping + 1 hour of active game play, fairly boring game.
Purple stages are way too easy; Just put the "J" attack first, then your strongest attack unit on the first line and then just spam key "1" until you can do "J" again
Required Unity player, gave the game 1/5. Can't play it. Most likely didn't lose anything either since when I saw the tags, got disappointment. Not my cup of tea.