Neat puzzle game! I did get stuck as the blue character after going up the elevator onto the platform with the door to the next room, and couldn't move that character anymore so I had to restart. I also sometimes lost the ability to throw the teleport sphere, but I would see it flying while playing as the other character, not sure if that was a bug or just a mechanic I didn't understand. I thought the mouse wheel to manipulate things was a cool way to do it.