That's an awesome games! I especially loved the atmosphere and the art style. I have some suggestions too:
Maybe explain objectives more clearly at the start of each level, I was looking for stones to light the fire for a few minutes until I found out I need woods.
The arm's end is sometimes visible, maybe make it a bit longer or change its position a little.
There were some points in the jungle where I would get stuck, and having no jump made it really hard to "unstuck" myself :D