Hi, thank you so much for leaving such a nice comment!
Yes, the flower button is quite too hidden... I realised. 😅 I wanted it to be hidden for the first-time player so I made it to look as if it's an illustration that is part of the GUI overlay (it had been a lesson for me to telegraph these things better when I make a new game, whenever I go outside the box of standard Ren'Py VN UI). Not clicking the button leads to the generic ending, and the idea was that you try to figure out from there how to get to the other endings.
There are some extra instructions in the "Help" screen. The "Endings" screen should also keep track for you which story parts you've already seen.
Anyway, I'm glad you enjoyed the game. 😊