This is a great concept, and I had a lot of fun playing! The darkness, limited torchlight, and creatures lurking outside the light create a tense atmosphere that fits the prehistoric theme and survival requirement very well.
My biggest suggestion would be to add a short “How to Play” screen explaining the controls, the objective, how to keep the torch alive, and what the player should collect or avoid. I had to learn everything through trial and error, and clear instructions would make the experience much easier to understand and enjoy from the beginning.
Overall, this was creative, atmospheric, and fun to play!