It's a solid game. You get a sense of panic when seeing the fire spread out of control, which makes you become hectic, which does not help controlling the fire. So, nice from a design standpoint triggering the emotions of the player.
I had some issue in the first three starts, where it instantly said, that I lose. Also you could turn the exit button into a 'retry' button, so that you do not have to restart the game completely.
Otherwise, good job! :)