I just watched the video and the game idea intrigued me. So lucky that the game got uploaded already.
I will update this comment after playing it. :)
- - - Update - - -
I am a qualified Astronomer from now on! No, but for real. A few days ago I was thinking about how interesting a sundial actually is and how people back in the day came up with this idea so seeing a game with a concept like this just a few days later made me really happy.
It took me 30 Minutes to figure everything out in the end (definitely not because I had to google translate what a solstice actually is haha... not that the dev actually gave us a hint in the tutorial).
Even though the game only consists of note taking and predicting, I genuinely enjoyed taking my time and get the information I needed to call myself a genius now.