I love the concept, but want way more levels. Honestly, forget all those people who can't deal with the lack of a freeze option. Having more puzzles is much more important and I don't want delays because people can't be bothered to spend 5 seconds readjusting pieces.
For all the people with stuck key issues, I believe that this may be a bug within Flash for IE8. The few games I have tested all have similar key sticking issues. Until Adobe releases a fixed version for IE8, you will just have to grin and bear it.
I won on relaxed and it gave me no badge or card. That copy/paste strategy is pure gold though. If Madagascar holds out on you, just buy sneezing, coughing, and vomiting to improve infectability.
 "Bubble Sky"){kind=icon}
 "Infectonator 2"){kind=icon}
 "Shape Fold"){kind=icon}
 "Use Boxmen"){kind=icon}
 "Assembler 3"){kind=icon}
 "Pandemic 2"){kind=icon}