I like the idea here and think you did a good job coming up with a creative game for the theme. I think adding some audio would really push this game to the next level.

Had to read other's comments to figure out how to play, so a tutorial might have helped. But I enjoyed it after that. :)

I struggled to find out what to do, but after trial-and-error I found out that I can move the grey box and place seeds with space bar. After that I was in the flow.  ;P

This was very fun! For me, the tasks of both planting the seeds and controlling the panels makes an interesting choice and decisions. However the controls were really confusing at first since there were no guidance, which tbh dropped the fun quite a bit for me.

Nice idea!

I missed some audio.

The visual feedback of the fading sun is well done.