Thank you so much for playing and taking the time to leave such encouraging feedback! I'm super glad to hear it ran smoothly and played well on your phone!
Since the protagonist is a raccoon, I intentionally omitted a storage system — raccoons live in the moment! This naturally forces players to constantly adapt, spending fish bones immediately on upgrades to prepare for unpredictable survival hazards.
Regarding the late-game balance, you hit the nail on the head. The exponential upgrade costs can make the bone-grinding loop feel repetitive right now.
This cost scaling is actually part of an intentional cost-efficiency curve design — if the efficiency of a single skill remained constant, it would lead to a dominant, repetitive strategy. However, in an upcoming update, I'll be introducing new skills, interactive objects, and more random events. The diminishing returns on single-skill upgrades will then naturally drive players to experiment with these new mechanics and adapt their strategies!
Thanks again for your awesome support and valuable insights — stay tuned for the update! ~