yet another raspberry pi based console case

my favorite style case for raspberry-pi based console featuring:
- rpi itself (RPi 2 is used in particular)
- 3.5 inch SPI screen from adafruit
- 2 analog joysticks connected via atmega32u4
- 2 12mm action/fire buttons
- 4 6mm utility buttons
- 2 buzzers
- custom made amplifier

some tips:
- the buttons and joysticks are obtained from ebay (the joysticks are those look much like from dualshock 2)
- the amplifier can be made based on very commonly found single chip LF amps. without amp