Whoa. This is incredible.
At the beginning, I was a little bit confused as to what each card did (ig im a little blind cause i didn't notice the cards on the bottom left lol). But once I got the gist of it, it was quite intuitive!
The SFX choice really made the mood, along with the water lighting effects, animations, cloud shadows, all of those REALLY contributed to the mood. Definitely felt the most peaceful and atmospheric game I've played so far! Really cool spin on the 10 seconds theme, adding the element of choice and civilization building to it. I do think that the upgraded structure recipes should maybe be accessible in like an in-game "info" tab or something, if you plan to make a post-jam version. Also, the wood mechanic/lumber mill, along with the water channel moving rate was hard to grasp until like ~10 minutes or so for me.
Really smooth, SUPER high quality, and having to choose quickly between what you need or don't need at the moment makes the gameplay quite fun. Played for like half an hour. Honestly just LOVE the civ-style take on the theme :)
minor note: I don't know if it was intended, but you can wait every 10 seconds to get a new batch of cards without decreasing "cards left", and food production doesn't stop either.