I love how you used Ren'Py here! All the moving sprites and dynamic chat bubbles gave the story a lot of pizazz. I actually like that it was a linear story with a canon ending. I think if I had to make choices here, I would've gone bonkers trying to get the other endings or felt conflicted about the true ending.
I think the characters were fun. Trevor was my favorite. He just seemed to end up in the wackiest situations from the bully to the cat allergy, and he handled them all in true nerd fashion. The length of the story was perfect for my preference (I think it was close to an hour).
I liked Cynthia's struggle with her childlike fantasy and trying to push it into her past, but her dream ended up being useful after all. Personal preference, but I wish the big fight had been a 3-person effort, because I wanted to see some of Rose and Trevor's dynamic. Overall, it was a wholesome, nicely written story that displays a lot of creativity with the Ren'Py engine.