The random upgrade challange was insainly difficult!
it was harder then the other 3 and all you get is a "nice" trophy!
for the next update can you make that the people who passed it will unlock an other new upgrade?
(btw did you complete it?)
also i noticed that weapons with fire have faster fire rate. is it true?
i agree with it being the hardest and hope we are rewarded in the future but what would that reward be? how about more energy regen? enough is never enough