Really cool game!
Two things I would recommend:
1. Maybe redo the intro cutscene using cameras in unity that are animated to move around (I think you can do this with the free add-on cinemachine)
2. ADD CHECKPOINTS! The game really needs checkpoints or just have some way to save your self when you get in the light (maybe make it so you have like 2 seconds to run out of the light before it kills you) otherwise the game is really hard.
Other than that cool game!