For my Android version I used bright colors – the exact colours borrowed from the Google Material Design palette – as I hoped this would make for an uplifiting visual experience. I planned on using some of the side buttons of the cellphone as controls for the application. After I had some problems with this, however, one of our designers (Paul) suggested that I rather use gesture controls. Finally, I settled for side-swiping gestures for linear motion and double tap for rotations (again with some input from Paul).
I thoroughly enjoyed creating my version of Gesture Tetris for Android!