Challenge 6 isn't that hard...it's all about getting a good start by picking up the first tiny orb immediately after shooting it even if you have to hurt yourself. Once you split the first into little ones it's easy.
The paddle in this game makes it annoying...it is a serious pain to change directions and bouncing off the side walls adds to the annoyance. Without complete control to move the paddle, what is the point?
Since when does Madagascar have no commerce? I started in Madagascar, waited 12 days for the first ship to leave it, and it took 5 days for the ship to infect Russia.