thanks for playing. Balancing is something we struggled with in the game-jam, some people found it too easy some people found it annoyingly hard. That's why there is a hard mode to be unfairly cruel to the player.
I think the bone zone is a bit of trail and error in an effort to complete, I'd would of liked to be more clear on what to do but time constraints and all left it the way it is now. It is Complete-able, which it originally wasn't (for some reason that level in particular kept crashing unity making it very impossible).
Anywho thanks for the feedback