Like Baka Arashi, I also encounter the same problem : a blank selection of answers (at Bubble Exams for Film Test and when interacting with Astor), an error page after taking Bubble Exams (at all three different route! I am compatible with Art Bubble, if that helps), and after taking Medication Bubble Test at the exhibition, Natari only appears as "bubble" or a view from up her head :'D
By the way, it has an excellent narration regarding issues of talent vs efforts and people expectations vs our own dreams :') And a gallery to revisit the CGs would be very delightful ^^