Wow, you are good at spatial puzzles. I really liked the Portal-vibe! The experience gives a chill vibe that is welcome for people who is not into thrilling, such as FPS/terror games. I enjoyed as I enjoy turn-based games, because it lets me observe and think, take my own time. I would make the character a bit faster, tho. But, for the rest, I think that is a very round experience.
Besides of the play loop, you designed a menu and a save game feature. In spite these jam games are short experiences, that tells a lot about your dedication, and gives the impression that the game really cares for the player to feel comfortable; it is like saying "hey, you can come back anytime". The timer for speed runners serves for this as well, as it is inviting to take another approach to the game (once you know the puzzles, maybe you can try to get efficient at solving them).
This easter egg got me:
