I think the base concept you had here has really cool potential, I just feel like if falls a bit off in certain places. Having to fiddle around with my backpack, to be able to time tight platforming movement to me broke the “flow” of the game. The concepts themself are great, I just think it would befit a slower paced adventure. Sound and music effects are waaay to loud for a normal usecase setting, next time check those before you publish. Other than these, nice entry.