This happens to me too. Its great that it works on android but every action takes around 3 to 5 seconds to process and happen, and everything is really laggy as you said. Also changing the screen settings sometimes crash the game (this might be just my problem though)
Hello, I am from latam and my English is not very good.
but I recommend that when you are in the fights, you could repeatedly press the screen, that way it speeds up a bit and skips almost all the animation of the attack.