Completing This Game!

Has anyone actually completed this game - it's driving me nuts as can't get past level 50 no matter how I try! I'd appreciate some ideas please

I finished this game. I don't remember how I beat 50 but I tried this on level 51 and 52 and it actually made it quite easy. I emptied out my inventory of everything except cats, dogs, and birds. Then I gave rainbow birds to as many people as possible. I had a lot of people leaving, but it still worked.