app needed for facebook

Lower bids are more prefered! Hello. We need a developer that is able to work in a project that integrates a Facebook game that works on Desktop and mobile (Android and iOs) environment. The project its about an educational game to our school. We need a game that is able to work on desktop and mobile enviroment. The idea is that the student would use mini-games on Facebook to play and learn at the same time. It also would have a rank so we could keep track of those that are getting better results, and at the end of the terms, those will receive prizes and so. Also, we need to be able to modify and add new questions and answers each new semester. So, it must be editable. The project will be extended throught next years, so we'll need more work of the same kind in the future. let me explain in a little more clear way. 1) The project is about a NEW game for the Facebook, where our students will be able to play a quiz/fill the blanks game. 2) At the end of trimester, for example, we wanna be able to rank those that obtained better results and award those students. 3) The interface must work on desktop and mobiles. 4) We must be able to change a few things, adding questions and answers and stuff at each new semester, for instance. 5) This is just a first game that we'll implement in our school, but we already have plans to others in the next few months, so, its possible that we'll have a few more projects in the near future.