The main objective is : SAVE as many CATS as possible on each mission!
Cross the obstacle courses and traps that will block your way.
Collect the coins to buy and save other species of cats so cute! Hmmm... Excuse me !!
If you lose cats along the way, don't panic, this event is somewhat tragic, you can pick up many more along the way.
Good luck in your mission!
One last little advice : try to not lose.