Great game, but a little quirky

Well, the game is fun and doable without having to get video help online. The music is great, the story is well told, and the graphics are engaging. I love the game!! I enjoy puzzling through the scenarios. Only one downside I see is that sometimes the game gets stuck and wont let you advance throught the puzzle. I dont want to ruin the story, but I should be able to do something in the game, but I can’t. Frustrating. I cant even finsih the game and if I start over, it does the same thing. I am using an iMac with OS X El Capitan. Help. I am dying to fix the problem so I can finish the game.

Poet 1967 about Nelly Cootalot: The Fowl Fleet