I played through this the other night and got stuck on what I thought was level 2. I just re-watched it after watching your YT walk through and I think I got teleported to one of the higher levels (4 I'm guessing).
After talking to the first character I shuffled the TODO list and clicked 'View Map' a couple of times...however I clicked a little rapidly because I was trying to move on the map (click and drag etc.) to view the whole level. So I got teleported to that level and got stuck because I had the same To-do list as level 2 and couldn't cross the gap. I tried reversing time in the middle to see if it was some tricky thing like that but nothing worked and I gave up.
I liked everything else about the game; graphics were well done, sound was nice, and I really like the idea. Will have to try it out again when I get a chance, but great submission!