Thank you the comment!
Unfortunately, I didn't have time to properly add a tutorial for the re-light aspect.
Basically you can re-light your player on a lit candle (even one you just lit!).
Therefore, the main mechanic is to go until you find a candle, light it, wait for your to totally run out, than re-light it by pressing Enter.
I don't know why a didn't simply re-lit it automatically... :/
Please, try again to hit the end! The are only two levels.
Again, thank you all for the feeback.