Summary

I'm not the best to 3D design, but it works for me. But if you want to change anything I'm also sharing the .f3d file for Fusion360.

Used a 4,3" composite screen soldered directly to the board.

Used PWM audio output: https://www.tinkernut.com/2017/04/adding-audio-output-raspberry-pi-zero-tinkernut-workbench/#lightbox[10497]/1/

A PAM8403 is used for audio amplifier.

Material List:
Disclaimer: These are not exactly the link where I bought, is just a model. So you might find cheaper

• 4,3" Composite Screen
  https://goo.gl/qYfAMf
  Some composite screens are made for 12V but works with 5V.

• XL6009 Step-up voltage converter
  https://goo.gl/x2Qboc

• Mini Audio Amplifier PAM8403
  https://goo.gl/ZWpwT3 (You migh want to take off the header and connectors to solder directly to the board and save space)

• USB SNES controller
  https://goo.gl/e2a52M (Using just the board)

• Some tactile switches (10)
  https://goo.gl/H8LfvQ

• 10x10 Prototype Solder Board
  https://goo.gl/Yfw4eF

• TP4056 Battery charger with protection
  https://goo.gl/jh6wwe

• 2x 3,7V 18650 Battery
  https://goo.gl/FveduX

• Green and red 5mm LED's (soldered in the Battery Charger)

• Raspberry Pi Zero