great, looking forward to it. I have been looking at various solution and I am thinking to make my own but need inspiration :)

No problem.

A "Raspberry Pi Zero W" with the "Adafruit Feather 32u4 Bluefruit LE" should do the trick when it comes to controls. Connecting the two devices via bluetooth and using the Feather as a keyboard should do the trick.

The Feather is programmable through the Arduino IDE.

Good luck! Ping me if you need any help with it!

Nice, the feather you mentioned looks great, can it power the pi zero too ? Can  I just plug the correct power pin to the pi and the feather take care of the battery ?

From what I can recall, the current coming from the Pi can't power the Feather because the current is too low (the GPIO pins are at max 16mA and the Feather needs 500mA). What I did instead was connect the LiPo battery directly to the Powerboost 1000C and connect the Feather's "3V" input pin to the "BAT" pin on the Powerboost. I connected the "5V" output pin on the Powerboost to the one on the Pi. 

You can find the Powerboost I used here: https://www.adafruit.com/product/2465

And you can find the graphic that helped me figure out how to hook up the Powerboost here (ignore the black circuit that the battery is connecting to): https://learn.adafruit.com/piphone-a-raspberry-pi-based-cellphone/hardware

Hey, just wondering if you have any update ?

Oh my bad. I forgot I even put this up on Hackaday. (lol)

So the thing is, ever since the Raspberry Pi Zero W was released (like two years ago) I've had to dismantle and rebuild the console with entirely new instructions and new CAD models. I just haven't had the time until about a month or so ago.

I plan to update these instructions in about a week with the full list of parts and necessary tools.