If your game is lagging, you may want to try to change the graphical quality to medium or low. Or by limiting the FPS to 30 or 60fps. You can do that in the settings of the game.

Available graphical settings:
  • Low
  • Normal
  • High
Available performance settings:
  • 30 fps
  • 60 fps
  • 60+ fps / unlimited (depends on the refresh rate of your device)