Senseless grinding
It’s such an interesting concept for a mobile rogue-lite game. Unfortunately it’s overshadowed by the amount of grinding required to beat later levels. There is a point where skill is not even a factor, it all boils down to how much time or money you’re willing to put in just to beat one level. Don’t worry, every time you fail you’ll get hit with another forced ad. I cannot recommend downloading this game, it’s really not worth sitting through ads and grinding.