On the left side of screen you have to tap blue ball and move this up and down to make drops from tank. Drops extinguish the flames. You get one point for one flame. If you play long every next second of play makes flames moves faster and faster.
Game uses taps to collect water in tank. If water level will be to small you can't use droplets to stop fire.
Game is simple solution of tower defence and arcade game too. Becouse arcade games are with simple game mechanics.
Try game and fun !