You start out as fly, and have to avoid fly swatters and bug sprays for like 15 minutes. Then you die of old age, and get reincarnated as a roach. Nothing can kill you, except for feet, so after like 20 minutes you die of old age, and get reincarnated as a little fish. And so one, until you work your way up to being a human being. Then you have to actual attain some spiritual goals, to become one of the angels.