I love the overall aesthetic of the game, and the lighting helps bring that iconic portal look. I admire the unique mechanics of unscrewing items, and the x-ray, overall the game was interesting to play.
However, I did have some issues playing, there is too much text, you don't want the player to feel stupid, it felt like the game was hand holding me. The mechanics are straight forward so I think you could implement a way to teach with minimal or no text. Another issue was the tutorial, after I fell into acid it played it again, which was annoying. And the falling into acid could have a better animation.
Apart from those simple fixes I really enjoyed playing your game, the environment is stunning and it has unique mechanics.
8/10