It took a little tinkering to figure it out, but it's actually pretty easy. The 'help' icon was certainly helpful. The problem is, my device does not have a microphone so, basically, I'll never be able to actually get a fire started. :( To all those bad reviewers who say the game just crashes: USER ERROR
But, to the creators: maybe you could make it more interesting, like with levels and different environments and different types of wood.