Time stops when I quit

Whenever I stop actively playing the game, even if I leave it running, my energy stops regenerating and Gamatoto stops counting down. You should certainly fix this, but I would also love it if you made this game just cost money instead of using energy to keep players coming back, and therefore looking at ads. If you just added a premium or something that got rid of the energy system, I would definitely buy it. Unless its, like, more than $7.

GGryphon about The Battle Cats, v5.0.0