Quoted from punkin:
No idea how i got it after it was lit
-Finish at least one mode. Note that a harder mode means bigger jackpot once you're Into the Fire.
-Collect all the dwarves.
-Start all the multi-balls (you don't have to finish them)
-Reach Erebor (use the orbit spinners, it advances to Erebor)
-Shoot one of the holes when they blink like fire.