Extremely greedy game.
First of all, there are no Idle elements in this game, so the advertising is false. Second, it’s obviously designed in a predatory and frustrating way. The progress grinds to a halt after a couple of hours, and then gem shop purchases are pushed on you. Maybe you wanted to support the devs with a little purchase? Nope, because of the gacha mechanics and prices, the lowest purchase option equals 300 gems, which in turn would give you A SINGLE gacha draw. To afford a 10-draw, you would have to buy two $10 packs, making a single 10-draw in this game worth $20 irl, according to the devs. The next pack is of course 5000 gems, at $50, leaving you with 1000 left over. These odd numbers are designed to manipulate you into buying the next, larger pack.