The first two puzzles were extremely satisfying. I haven’t played portal for ages, so I’m probably not the best judge, but they took me a little while to figure out and I got that nice little “Ah ha!” moment when I did. The last section was a good change of pace, but to be honest I just muddled through without really understanding what I was trying to do and was slightly surprised to find myself at the end. It meant that the pacing didn’t feel quite right. I would have preferred to finish on a high note, feeling smart after solving a puzzle. I think it might work better if the open section came at the start, or in between to break up the puzzles? Either way, great level! Nice work!