Nice one! I liked the lighting effects, the puzzle like nature of the game was cool. I got 2:15 my second run through.
My only gripe is that the falling panels are a bit too fast for the speed of the observation tools. I found it hard to react. I ended up in the end solving that section by just blind jumping in the dark, which feels counter intuitive after the clever puzzles before. I'd love a little more delay on the falling/timed sections if you expand this to a bigger game, to let the player observe their surroundings and smartly "puzzle" their way through Portal final level style.
I loved the little teaching puzzle with the hidden arrows. The little metroid-like surprise in the controls was cool too! There's a lot of great design here! Thanks for a great game!