Tennis IPhone application - 75% completed, needs corrections, enhancements

The object of this project is to complete previously started app for Iphone, test for errors and make few corrections. Application requires some knowledge of the tennis game. Please do not send default messages, but describe why you feel you can handle this project. T.E.S.T. app is designed for testing skill levels of tennis players. Test is conducted on the tennis court with the utilization of the ball machine. There are 10 pre-programmed drills that the user can chose (user has ability to create their own drills). Each drill has several specific shots that the ball machine serves and player has to hit specific targets. Based on the tapping input, the program measures effectiveness of performed shots and creates statistical information on various aspects of player's skill. Program is largely completed and requires some corrections and some enhancements (please check attached document). Knowledge of the tennis game is a plus. Code and further details available to succesful bidder.