Why there is no progress in waves when game is off? Game required to be all time displayed and watch boring waves then there are 60 of them? It boring and batter consuming - pointless. Design of monsters are great, it's really fun to see how your monster getting stronger and can evolve, but as I say prevesly it's everything pointless there is no goal in this game, diffrences in power across levels is not normal. The flaws are so important that I have to give 1 star 😞