Hey, awesome game! I really enjoyed the portal mechanics — super creative and fun to experiment with. That said, I found the platforming quite difficult, and the game isn't very forgiving when you make a mistake. Failing near the end of a level and having to start over can be pretty frustrating. Since the strength of the game seems to lie more in the puzzle aspect, I think it might benefit from making the platforming a bit easier, or at least adding checkpoints to reduce the punishment for small errors.
Also, the controls for switching between portal colors felt a bit unintuitive and slowed things down for me. Maybe a more streamlined system would improve the overall flow.
Still, I had a lot of fun playing — great work overall!