You have to load all the individual pictures into either the Theta+ App on your phone (can get from the play store) or you can use Microsoft ICE (Image Composite Editor) on your PC by loading the pictures from the SD card. (Image Composite Editor - Microsoft Research)
Sorry for the delay.If you download from the app (goto gallery and choose files from sd card) you will get an horizontal piano like u did. After open the theta + app and find the file from your phone. From the app the you choose if you like to make a tinyplanet or a animation or just a piano.