Thanks for your comment!
I’m glad you liked the boss idea (and that you had to play again to get an easy version) because that was definitly our mail goal!
About the laboratory, I think you did miss something but I agree that it’s maybe a bit too well hidden so here is a little help:
When you are in the past version of the world and try to reach the laboratory, there is a big lock instead of a numpad, and you might have a surprise while trying to reach the corridor from that point of time and from the inside… Tell me if you managed to find the secret :)