Getting black screen after executing on the Android phone

Hi, I'm getting black screen after I build and execute it on the Android phone (Prada 3.0) As you can see, there's only one sphere that can be seen on the screen. I'm creating in the 2D environment and tried both 'Use 24-bit Depth Buffer', 'Use 32-bit Display Buffer' checked and unchecked.

Is there something else I should check? Any advice for me please? Thanks in advance