The art and music for the game are great, and the controls are very smooth.
I think I somewhat understand there was a day/ night cycle, and how each plant had different needs, but I have yet to decipher what each symbol meant. Sometimes it is hard to see them against the similarly colored background. It was also nice to explore the area outside the main garden. (A lot of potential for lore :))
I feel like this would make for a nice gardening/ puzzle game but I'm not sure if applying "unpredictable rules" for the symbols was helpful. There isn't much motivation for the player to try and collect as many plants as they can. (A pokedex style encyclopedia/ device for the player to learn more about the plants could be a nice addition)
Also, this might be a bug but for some reason my cursor has a black square hovering over it that blocks the view a little.
Great job on the game though!