This seems like really good reflex game, but classic mode is WAY too difficult. I think it be would best to lower how fast the time speed up. This would allow more people to see how drastic the decay can get and possibly finish the mode to move onto others more naturally. Also I'm not sure how much this aligns with cosmic horror vibes of the jam, but that might be less important.
(My best scores for Classic, Hardcore, and Endless are 25, 15, and 26 respectively.)