Cool game! I've played a few games with the same "time-traveling clone" mechanic, but this managed to differentiate itself well mechanically from those other ones. A lot of the games of that type tend to frustrate me by how easy it is to mess up and lose a lot of work, but I never felt that same frustration with this game, so good job!
While I found the puzzles mostly understandable and intuitive, I don't think I got the "correct" solution for the puzzle with the elevator. I think there was some mechanic that I didn't fully grasp. I ended up kicking the block down on the switch and jumping over, which, to be fair, is probably a good speed run strat.