My first thought on seeing this was wow, this is a bold step for the series. I think it has toyed with these themes before, but this is deeper, darker, more real, and more serious.
That line about not being able to go back in particular hits hard.
I love the setting of the ruined dream city. We barely got to explore it in this game, but I'm excited to see more of it.
The graphics, animations, and FacemeltingSolos soundtrack are, as usual, spot-on. I like the mirror effect on the water in particular (being vague, because spoilers).
The UX... it breaks from adventure game conventions and I'm not convinced.. Having to be close to objects to interact with them is annoying, and it isn't helped by June's glacial movement speed. Clicking and dragging items to use them just feels weird, and it's not helped by the pop-in inventory panel. None of it kills the game, but all together it makes it feel awkward and kinda janky.
The hinting on what can be interacted with and how is much appreciated, though, and it feels immediately intuitive without needing explanation.
For better or for worse, my biggest complaint about this game is its brevity. It's a demo, but feels short even for a demo. I'm definitely excited for future updates!