Hi! Just stumbled upon this from your Bluesky! I don't know if you are still looking for feedback, but here's mine:
Game rules: I played the game just once, and I am not sure I understood it all. It seems that harvesting seeds then plant them again always leads to having a lot of seeds available. Then using the buttons below leads to different "gardens" where this strategy can be repeated again until you can access new gardens. If the garden is full, a special seed can be harvested. Is there something more to it? I didn't find it difficult at all, and that seems to be on purpose, to focus more on exploring the music.
UX: no real problems with that, maybe the buttons below to teleport to different gardens could be bigger..?
Instructions: I personally like games that feel a bit alien at first, with no explicit instructions. That said, a smaller garden with just two tiles as an introduction could have done a tutorial impression without actually having one that tells you what to do.