It is a very good demo that gives a good visualization of the somewhat more oppressive environment to the saga on which it is based, generating in sections a sense of urgency and exploration with the oxygen meter mechanism that forces you to cross quickly or look for possible air spaces to survive the exploration that gives it a different but fresh touch. Mobility is somewhat clearer than in Super Metroid, you cannot jump on the walls but a mechanism of ledges was added to climb that I liked to give verticality to the levels and it seems more "normal" for the doors to open when close instead of shooting them. It also made me curious how the character crawls to pass through small spaces, which makes me think that the Metroid morphball probably originated to make a simple animation when passing through closed spaces. I hope to see the complete project.
I made a gameplay capturing the inputs of the control, although I must say that the control was quite responsive and fluid.