Click the green flag. The flame will follow your cursor if it is in the player window,otherwise it will go back to its default position. Press space to ignite/extinguish the flame. You like simulations? Well, you should check out my new 3D Ripple Simulation at http://scratch.mit.edu/projects/16995617/
Don't forget to love it. 6th project to be under "What the Community is Loving!" This is pretty much just the flames from my cake designer, but a lot bigger. You can see the cake designer here: http://scratch.mit.edu/projects/16460658/