Bugs: Some of the branches' collisions are a bit awkward. You can even fall through one of them on the right. Also, the light doesn't always follow which way the player if facing.
Strengths: The walking animation of the character is quite smooth and the lighting is quite moody and atmospheric, almost conveying the feeling that the player really is lost in the forest. The level is also quite long and engaging.
Weaknesses: The enemies simply just disappear when you jump on them instead of being flattened.
Changes: Have the lamps that you light illuminate the area a bit better. Also, add in a counter for the lanterns so that you know how many there are in the level. Furthermore, give the enemies a squished sprite that appears after you jump on them.