Very cool! I was very impressed as soon as I booted up, the game looks very good and the animation is nice.
I really liked the ending because getting through labs 1-4 you get used to how things go, so seeing the door just open after the code but the player not entering instantly made me fascinated, and I loved the-- thing that happens at the end (Not spoiling it for anyone who has yet to play)!
That being said the game possibly demands too much time for the paper-clicking, kinda like porkrind commented, where perhaps it would be best to shorten the time and instead introduce a new mechanic/catch to increase difficulty.
Overall it was very cool, great presentation, and loved the one lore note!