Yep, it isn't that well explained. Minerals persist, but power/population go away at the end of the turn (so you should try to use all the power you're producing, you can't save it).

It wasn't too well explained, sorry. Solar panels provide energy every turn, habs provide population every turn, and factories produce resources at the cost of population and energy (but only when you click them, so you can choose not to produce on a turn). Buildings that fall into darkness on the left are destroyed. Thanks for trying it out!

Haha yes @udreif, I didn't have time to properly balance the difficulty, so I had a choice of either making it endless, or making it eventually become impossible. I chose the latter, so if you got to that point, you "won" :)