Hola Xziled, it was nice to sit in and try to help to the best of my ability!
I was so excited to see someone play the game, I took time out of my vacation to try and watch it on my phone using mobile data. Lol.
As the writer for the Prismrivers route, I can say the flowers choice might honestly be a little bit of an oversight! I think in canon, she would probably flash her fingers to indicate her choice, much like for Lyrica's part. Or maybe be more inventive and use a mask. It's up to your imagination!
Thank you so much for your feedback, and I'm glad you enjoyed the game. I was worried due to the language barrier about your feelings regarding the game, but reading you liked it is quite the relief!