Oh yeah, this is a great improvement! I like that I get to retry levels after I fail them. Lvl 4 was a nice puzzle too :) Currently stuck on level 9.
Not sure if I understand why there is a pause button though?
Feature requests would be to have a main menu with an overview of the levels (with opportunity to replay).
Edit: Finished level 9 too now and looped around :) Very entertaining, can see myself playing this as a great timewaster.