Absolutely terrible gatcha game that severely limits your progress unless you pay to pull elite characters. The power difference between the various star leveled characters makes it difficult to beat levels if you don't have the right characters. 1 pull is 300 gold, and this game is stingy about giving them out. You can get about 1 pull a week if you grind, which is ridiculous. Also a blatant ripoff of puzzles and survival.