Game is very hard at the later levels. Playing the first time on Land of the Livid Dead wants you to take a plane and go to frunch to punch Michel Ancel's face, literally, but, with some time you know how the levels are and get it better.
The first time I had to finish LOTLD I spent more than 3 hours to do it. The second time (cause we were playing different games, my daughter's and mine) it took me around half an hour.
C'mon, it is not as hard, it is a matter of practice. My six years old daughter can grab all the teeth minus the last one by herself (sure, she has a LOT of time to practice, fail and retry)