Simple and compelling. Suggestions:
1. The game needs to ramp up faster. I see a screenshot with two seekers but I only ever saw one.
2. The player needs more motivation to go far from the fire. That is where risk and reward comes in. If you spawn new firewood near the fire, the player is just going to stay there.
3. The fire could be a light source if the game was set during the night,
4. The fire could spread to allow for another interpretation of the them "out of control".
I recommend looking at LD46 games. It had a lot of neat games with fire going out as a central mechanic.
There are a lot of ways you can expand on this.