Thanks you all for playing my first Ludum Dare game :) I'm really happy of these positive feedback about this hand drawn graphics.
Rain & water are the most common resource. Disciples collect them through plain where their houses usually starts.
There is no winning condition, this is the fate of gods to be forgotten... If you want one, you can try to obtain maximum disciples without losing all your energy. Maybe I should made a victory screen when we managed to convert the entire population of the map. But that meant stopping the game at this moment.
Asking a thunderstorm for fire is quite strange, I agree. I had in mind to refer to the discovery of fire. I should add a tree that burn whit the storm in this animation.