Just feed it and water it using the buttons but don't water it too much as it'll die.
Sorry that it's not a gardening sim but it's still got something to do with gardening. This is where I found out how smooth vector mode is compared to pixelated bitmap mode... Shoutouts for now: @OliverVelasco (or @Gryffindor26 ) @rainbow-panda @FriendsFromThePast