Joystick for Android phone games

Joystick for Android phone games
When I see virtual reality glasses like Google Cardboard and games growing in this platform. By my experience in virtual reality sensors as like as MPU, I decide to design a Joystick for smartphones and these type of games. playing these type of games was very interesting but unfortunately, there was no good controller for them, So I design this as you see in figures below. It connects to the smartphones by Bluetooth and sense the hand movements and angles and send them to the game environment. Also, it has some bottoms for various tasks.