It's a standard idle game that on the surface seems generous with the freebies it gives you but the more you play the more you realize how worthless those freebies are. The gacha, centered around buff giving "treasures" have ridiculously low rates and barely affect gameplay relying on you getting more of the same "treasure" to upgrade them aka only by rolling a lot AND being ridiculously lucky can you be "better". The grind is terrible and is only meant to push to towards the premium shop.