Don't let the thumbnail fool you. Your game in the video is the second one.
This was a great start for a promising game. I really liked the idea of solving puzzles in a meaningful way. It was a very well made atmosphere and story. I gave some critique in the video about urgency in the game. Disabling run is a bit odd since it removes the pressure of time. I know why the character can't run, but it still felt too weak of a reason. It made the character act like he doesn't truly desire to live. I probably can assume you will have sprinting in the full game. For the demo maybe let the player have a much shorter sprint (one or two seconds long) to show that he is trying to survive. Other than that, the game is really exciting and I have wish listed the game on steam. I can't wait to solve more puzzles!