1. Early completion bonus is impossible without purchasing ticket (EX : 3 day time limit for a chapter with 29 stage, rly?)
2. IAP price is fairly expensive, considering on how much daily ads they get.
3. The coin price for unlocking special CG and character gallery (failed early completion bonus) is pretty dang expensive, even u can barely earn 100 coins a day, meanwhile special CG cost 1k coins and character gallery cost 2k coins, and thus forcing players to buy coins to unlock them.
4. I like that there is an extra story after true ending, but it's a pay to play. $19 for an extra story is kinda expensive for a mobile game(maybe?)
And guess what? I've failed all the early completion bonus from chapter 3 to chapter 8, even tho i've watched daily ads and no stage failure.
Overall, it's fun to play, and purchasing things is optional, but, good luck on waiting for a very long time if you're a f2p and want to unlock everything