My first idea for this jam was actually something very similar, but I couldn't get the "portal mechanic" looking seamless enough, so I scrapped that idea and made something else. Great execution from you, though. Loved the Portal-like vibes and the atmosphere overall; sounds are great and very fitting. Puzzles are fun, nailing the line between challenging but not too hard. Overall, a very polished project. I only noticed some small things, like the keys clipping through the walls, for example, but that would be a quick fix if you decide to come back to this. Really glad someone made a game like this, as I also thought it would fit the theme very well. Great job.