Hi, thank you for your comment! My interpretation of the theme illuminate is the photosynthesis so, you "illuminate" flowers to make them grow. You don't need light to be in the theme, but yes, there should have been more visual indicators. Also, if you couldn't water the tree, it is probably because you didn't have enough water. Like I said in the game, "[The tree] needs lot of water". But it is my first game in Godot so I understand that there are a lot of issues :) (Hope you can understand my comment, I don't speak english)