It was nice planting the flowers and seeing them come up the next day. Experimenting with the potions was fun (and the recipe book was a nice bonus). The music was pleasant, and didn't outwear its welcome.
I did have a little trouble figuring out the UI at first--the second row of UI elements at the top had me fooled for a while. I think it would have been possible to display all the icons simultaneously.
Overall, a solid entry. One thing that might have made everything a little more fun might be a bit of flavor text: names for the different plants, names for the different potions, names for the different monsters.