here's a quick review:
-nice textures and depth of field
-good lighting for the most part
-good atmospheric sound
-was a bit too dark in the beginning corridors even with lamp
-a climbing mechanic would be super useful for ledges
-lack of direction or instruction
-the platforming needs a lot of work and i cannot stress this enough. i had to stop playing after spending at least fifteen minutes trying to scale the ruins to get to an orb. platforming games have to be smooth, or your players will not enjoy playing and just get frustrated. i tried hopping on so many different bushes and bricks to hopefully reach a certain point only to be pushed off every single time.
the game has potential, use the strenghts implemented in the game already to win people over. good luck in further creations.