Facebook & phone app Audio/Video editing game

The project is to develop a Facebook app where users can create Audio/Video mixes and save it to gallery and post them on their Facebook walls - User must be able to login using his/her Facebook account (user basic info to be saved in a database) - The game will have a list of 10 video clips and 10 Audio tracks where user can drag and drop into a editing workspace - The goal is to arrange 3 videos clips and 3 audio tracks as a Audio/video mix - User can attach each audio track to 1 video clip - User can drag and drop to rearranges the audio tracks or video clips places - User should be able to modify the Audio pitch volume using a slider (4 levels of pitch only) - An ending clip ending clip will be added automatically when the user publish the mix - A gallery page to be developed so other Facebook users can view the mixes and like it or share it on their walls - User should be able to share his/her result on the users gallery - User should also be able to post it on his/her Facebook wall - User should be able to preview the mix before saving to gallery or posting to wall - Backend should be developed so the admin can upload audio and video files, check users info - Project should work as a Facebook app and should be work on phones and tablets (IOS and Android) All designs, layouts and artworks will be provided from my end. Your part of work is to develop the app