The core game mechanic was done in a couple of weeks. The rest took two and a half years :D Some more details: There are multiple kinds of clouds, which can sp

The core game mechanic was done in a couple of weeks. The rest took two and a half years :D Some more details: There are multiple kinds of clouds, which can spawn at specific heights. They are spawned at semi-random intervals. The stars only shine after midnight, they are dull at dusk. Every object's colour values are separately changed according to the time of day. There is a delay between UI and scene dawn/dusk times because you're supposed to be far away and looking at the distant city. I can write all day about this stuff, as I'm very excited but I'll control myself for now :)