Create a short film for a mobile game

We want to create a teaser video for our mobile game. It will not be more than 90 seconds. The video will include: some motion graphics, animation of character, high quality screencast of our mobile game sound effects We have the basic concept, which we will discuss with you to get the best result. We will provide you with our original assets that we will be used in the video. You will also be provided with the game which you can download and test and record. There is not going to be any voice over, just the sound effects and/or background music. All design, animations will be in 2D. please show us your best work. Any explanatory video you have done, any motion graphics, character animation and iphone app screen casting that you have done before. please type "video for game" in the first line of your reply to be considered a serious candidate.