I have played similar before,but this is pretty good. Taken the ideas you have to update it, it will be very good. Mobile wise there are so many free with ads games,it hard to say if it will succeed.
Yeh I have no illusions of success, but I've been thinking about making something ad supported for mobile for ages and decided that now's the time. As long as I have something there, and hey you never know until you try, right?