App will not open

I installed and reinstalled the "Stuck on Earth" app 3 times and still it will not open. Error message says that this app is not compatible with my current version of software. I am running on my Mac the following version: OSX 10.7 Lion. In your app description it says that it works with 10.7 Lion. So what is the problem??? Please fix.

Wiesiu33 about Stuck On Earth - Free World Travel Guide