me and my wife have also played it. it's fun. i'm actually excited to play it with my daughter when she's big enough. it's actually harder to play multiplayer because you don't get to pause and strategize.
the gameplay loop is casual but also addictive. it's a low-stakes, low-difficulty game, so the real challenge becomes to get as much done in a single day as possible. in 2nd and 3rd play throughs you find yourself giving yourself personal challenges like "get married to an NPC before summer" or "get to level 100 in the mines before fall."
it has lots of different playstyles too. i've seen people avoid farming altogether and go for a purely fishing-based playstyle, for example.
the game actually has a competitive scene and really good immersive mods (like stardew expanded), and the base game was made by a single guy by himself who had never developed a game before.