I have been thinking of making a GBZ for a while now and finally have the guts to start a project like this.

I also have been stalking the forum for picking the parts i need to build one but there are so many diffrent kind of builds that im lost atm...
This is what i have got now:
The shell is a GBA btw,
Raspberry Pi zero w
SNES controller for buttons
3.7v 3000mah lipo 2.8 TFT LCD Mono 2.5w audio amp 5V mini PCM2704 USB HIFI Also this amp 3.7V to 5V step up Is this all the parts i need or are there more?
I will be scraping the sound pedometer/ on-off switch and speaker from the original GBA.
Any thoughts on the parts list?
All help is welcome

Friendly regards a noob