Using the Gameduino shield with the Arduino Mega 2560 (or ADK) needs an additional wiring : the SPI bus must be wired to pins 11,12 and 13:
- pin 51 (MOSI) is connected to pin 11,
- pin 50 (MISO) is connected to pin 12,
- pin 52 (SCK) is connected to pin 13.