The overall experience of the game is quite interesting as the main character ventures around to obtain rock samples and explore caves. I felt that the redness of the whole game is just overwhelming as I can only see the colour of red while playing the whole game so it would be kinda cooler if more variations of colours were used throughout the game with red being the scary and horrific colour. The sensitivity can be slightly tuned up abit as I took quite a long time to find the rock cause I couldn't see where I was turning and how slow I was turning. I believe that the reason for the low sensitivity is to increase the stress levels of the player in the cave when trying to turn back to run back. A little higher sensitivity would probably do the trick or a better view of the surroundings at the start of the game.
I want to know more about the storyline so it would be kinda cool if there was an actual storyline added to the game. I am pretty amazed as to how you made use of the colour red to create this entire game even though red is a really blinding and horrific colour.
Thank you for reading my comment and I wish you good luck in your future endeavours.