Adding an incremental skill system would allow players to gain "rewards" for playing the game and doing actions, the first skill i'd suggest would be adding an "Stamina" skill which improves how long the player can run for, increasing every time they run out of stamina by a small percentage.
This system could be expandable to add any skill needed for future quests, and even skills to retroactively improve other elements of gameplay.
Adding an incremental skill system would allow players to gain "rewards" for playing the game and doing actions, the first skill i'd suggest would be adding an "Stamina" skill which improves how long the player can run for, increasing every time they run out of stamina by a small percentage.
This system could be expandable to add any skill needed for future quests, and even skills to retroactively improve other elements of gameplay.