Currently, my game is unfinished, but I've received some encouraging feedback to continue working on it. Now, I need your brutal honesty:

Game Concept:
You're alone in the frozen woods, your campfire is your only source of light, and your health bar. During the night, enemies try to destroy your campfire, and you must defend it. Collect their souls to level up yourself, to heal your campfire, or buy weapons or skills from the merchant to upgrade your combat skills. Lose the fire, lose your life. How long could you survive until the last light in the forest is put out?

Question: 
Would this keep you playing for more than 10 minutes? Why/why not?
What existing game does this remind you of (good or bad)?
If I could only add or remove ONE thing, what would it be?

Thanks For The Feedback! :)

Link to Game - https://chestnut-god.itch.io/dying-ember