I'm still trying to find ways to further monetize my iPhone math game: http://www.mathogen.com http://www.mathogen.com Mathogen teaches kids (3-10) addition, s

I'm still trying to find ways to further monetize my iPhone math game: http://www.mathogen.com http://www.mathogen.com Mathogen teaches kids (3-10) addition, subtraction, multiplication, and division through a cute and colorful pattern matching mechanic (faster comprehension means higher scores). I thought $2.99 in the App Store would be a sweet price but anything over 99 cents seems like a deterrent. Does anyone have experience making money with their games on Facebook? If I release my game on more platforms, more people will talk about the game and purchase it, right? I would love your feedback.