What a nice and relaxing way to spend 5 minutes! I like the implementation of the optional theme. The progression felt nice - not too fast and not too slow. I somehow missed the little green lines on the water & nutrients and so my first time around I just filled them up completely and killed my tree :( But the second time around I got it to bloom! I can totally see this becoming an extended game with different trees that offer new challenges. The only feedback I could offer is that it might have been nice to have some more decoration in the room, but that's a small thing. Good job!