Hey, thanks for the feedback, glad you hear you enjoyed it! Were there any issues you found while playing or any levels too difficult? Lets us know if you don't mind.
I'm gonna be honest, when we could only control one portal - it was somehow harder, then when you could control both. Also, I had a very short confusion about how I can control the player, when I realised, that I can't, I'll have to solve everything with the portals.
Other than that, I think most of the puzzles were quite good, not too hard, but you have to think / experiment a bit.