I loved this! It reminds me of various flash games I'd sink hours of time into.
The presentation is great. Music is fantastic, art is clean and beautiful. I did notice some problems although nothing game breaking and most are pretty simple fixes.
Before I get into the problems I'll mention this which may have been unintended but I feel like it helped the gameplay. In game the click actions register on both press and release which actually made the game much snappier to play as I could interact with two tiles by clicking and releasing at the right time. As I got used to it, it felt really smooth and helped me tend the garden with ease. I am genuinely curious if this was intentional or not so please let me know!
The first actual problem I came across was that on the main menu when you have how to or credits open and click play, then that stays on screen until (I assume) the scene changes. Nothing too major since it won't actually interfere with the game much other than covering the initial text.
Speaking of text, I'd suggest a slightly modified approach to text streaming. A few weeks ago I was experimenting with this same thing and found that a cleaner way would be to send all of the text to the label and instead start at visible_characters = 0 and use physics_process to add to it. The result is that as the text is streaming, it won't get cut off at the end of the line and snap to the next once the word is complete. Again, nothing too major and I probably wouldn't have even noticed if I hadn't experimented with it myself recently.
There was only one problem that I felt like actually affected the game in a noticeable way. When multiple fauna appear at the same time, then the music overlays for a few seconds and breaks until another one appears. I'm not too sure what's going on under the hood so I don't have any suggestions for this.
Don't worry, despite me talking about the issues for so long, I did really enjoy it. The issues I listed are pretty minor but I just wanted to give some insight, especially with the text streaming as it's something I tackled before myself. I wish more people would give this a try but I guess people really don't feel like playing submissions if there isn't a browser version available. Still at least all the people that commented, have all enjoyed it!