Spoilers/suggestion for the game below.
Just a suggestion when it comes to Nightmare mode, I think the hook could honestly benefit a degrading durability mechanic.
Base on themes grief, regret and deterioration you got it all baked it the game tying so directly together. It will honestly be good because it also shows the protagonist slowly deteriorating along with the hook and with the flames/embers already both can slightly heal you and the hook.
It could a good mechanic and to decrease the random chance of you easily out running Jerry and beating the game.
Just a suggestion.