I'm enjoying this game. It gets me "in the zone" in a way not many games do, and more continuously than something like Mini Metro. There's always something to do (even if it's just making a dozen potions of hydration to get rid of all this hydrangea), and that makes it hard to put down.
Speaking of which, one major complaint I have is the lack of an apparent "Exit Game" button, which makes it hard to put down in a good way. And apparently the task manager didn't end all of it, because I came back the next morning and saw that it was still technically running. Somehow.
Another criticism I have is the lack of a few quality of life features, such as some way to queue up a bunch of identical potions at once instead of just clicking the icon every few seconds. (I had a lot of hydrangea at one point, and it was really annoying to make all those hydration potions, which stuck with me whenever .) It would also be nice if weeds were more obvious on plants with a lot of green in the palette.
(But not having to drag the ingredients to the cauldron every time was nice, once I noticed it. And the fact that you can click-and-drag to mass sow/reap.)
I realize that I have two paragraphs of criticism and only one of praise, but my overall impression is definitely positive. It's a simple game, but engaging and surprisingly cerebral. The problem with being a simple, enjoyable game is that you can't say much about why it's engaging. Unless maybe you're a game designer, but I just watch some on YouTube. Um...flow? The flow is good?