The course is in beta (11/1/16) so no. That is the feature of 'mature' courses.
Still in beta? I love all your efforts with the course! Speaking exercises would be a big boon indeed!
Potzhebuyeu / Potshebuyeu will be closer. "eu" doesn't have to be that clear, can by more like 'e'.
"potrzebować" needs Genitive, which for plural "koty" is "kotów".
I think many natives make a mistake of using Accusative, but it's not correct.
I think -y is for words like 'tata', 'turysta', 'mężczyzna' and similar - which are masculine but look like feminine words.