I think there should be a round sun and round moon. Notch, its your game. Evolve it anyway you want, countless people will still be addicted. Try to add moon phases; crescent, full, whatever. Perhaps change the lighting depending on the location of the moon or sun, shadows (if thats not too difficult) I love this game and i will play despite anything you do to it. Every update feels like playing a new game, i like that