VEX Nothing But Net Scoring

This is my first attempt at making a mobile application, so I'd appreciate any constructive advice. This app coincidentally is very similar to another app, which I did not realize existed until after I completed it. The app features an easy to use UI that all fits onto a single screen to allow for easy scoring by a user during practice or a match. The timer features VEX sound files similar to those used in actual tournament which sound at the start of the timer, with 30 seconds remaining, and when time expires, as well as the VEX abort sound effect that sounds if the timer is reset prematurely. The app has accurate scoring and will likely be updated with the Q&As and manual updates throughout the season. If the app is received well, expect added features in the future! Thanks.