Overall nice puzzles. It was far too easy for my taste, but very thoughtful. A significant improvement from the old puzzles for sure.
Very solid movement, a few tweaks here and there and it going to be perfect. I get the idea of the hub, but for me it breaks the flow too much. The hub has to be a "world map-like" or something "menu-y", the plataformer-style hub is way too repetitive and annoying. Or at least make the player start from the last door they entered. But imho, the hub must be rethinked. Or the better: no hub, just level-like flow.
Good luck with the development, looking forward to see the final game!