Three new iPhone game ideas!

I came up with three new iPhone ideas, that I am very eager to work on. First will be an all time favorite of mine that I created back in High School when I was taking my first computer science course. I call the game "Monster Rally" which was basically a very simple game programmed in C++ using the Direct X API. I want to make it more sophisticated in the iPhone version so players can upgrade their guns and have different monsters that attack.