The game is fun. I love the graphic style and sound design (excluding ambient), it feels great when the timer hits "just right" (when I just segregated all animals and after 1 second I get another rule to wrap my head around). Just a few extra thoughts:
1) Categories of "animals" are a bit confusing to me (especially 'shapes' and 'symbols') but its maybe just because I am no native speaker
2) Ambient doesn't fit for me, especially as game progresses and I have more and more animals to controll, the calm ambient giving the "relax game" vibe doesn't really cut it.
3) It feels like the time of each "turn" should be more tuned to the numbers of animals, at some points it fits just right but sometimes its way off (especially at the beggining when I have my 3 guys, already segregated and wait for another 27 second staring at the screen
The game itself is a fun concept :D