will you be done in time for World War III?

please add AltGr https://en.wikipedia.org/wiki/AltGr_key  many languages. If it is not trouble add knob for volume, control and pgup down etc.

is possible puting biger screen but not color? for power eficient

You can connect any screen if you configure driver, In next release I can add +6 buttons

In my opinion when we use software that has already been in use for years, then unfortunately the keyboard is very important. Keyboard shortcuts are often permanently fixed and cannot be changed.

Therfore if this is linux not You own system the keyboard is important. Not everyone is going to use mouse on this hardware.

As for the screen, some keys (e.g. F1 ) can be moved near to the screen (on cover).

What do you think about the fact that the mounting holes should not only use raspberry pi zero but also orange crab and any feather layout? Orange crab have lipo power connector too.

I am limited with GPIO count, I found one more extra GPIO when I not use RESET line on display. I can not use any chip so it is limited, I understand you

meybe change a linux keyboard driver? this is probably only text file .... 

Code is on github, feel free to modify

i wrote about increase keys and not using more GPIO