I made it through on my first try this time! Or at least I think so, the Thanks for playing screen is the end, right? The text doesn't mean I'm supposed to do some meta stuff to unlock the next levels?
Was the rewind a new thing or did I simply not notice it last time? Either way, being able to quickly undo stuff when you are stuck feels so much better than restarting the whole level every time. There were a lot of small things I noticed, like the level restart animation being skippable, I enjoyed these little things, it felt really polished.
Honestly, I would have loved to play the previous levels with this version. Then again I do think that the new levels had a better flow than last time.
I noticed your update post hinted at some sort of story, I'd like to see that in-game, though I don't know if that would go against the design you are going for.
Really looking forward to the full and/or next version.