Presumably an educational game about teaching simple math. On that front, I'm not sure of its success--as the game (at least on its simplest mode) repeats the same questions numerous times.
There is some information on electricity and solar arrays which will allow the player to answer some practical math questions. But I found the instructions rather unclear on how to "optimize" the array. (Spoiler - click to show)Playing it by ear and just assuming bigger is better seemed to work.
Because events are randomized, I'm not sure if a winning state is possible on any given playthrough. (Spoiler - click to show)Because of the %-mood loss is so great for going a night without using a heater, I never managed to survive a game if I was not able to purchase or review a heater before winter.
I won by (Spoiler - click to show)buying a lot of new batteries at least once during each winter. I am doubtful if this is what the takeaway should be for a game trying to encourage a minimalist living.