Graphics

You would have to set the correct bits up in the arraybuffer g.buffer. Maybe:

var Graphics = { createArrayBuffer : function(x,y,bpp,flags) {
  return { buffer : new ArrayBuffer(x*y*bpp >> 3); }
}};
var g = require(lcd).connect...;
var a = new Uint8Array(g.buffer);
a[0] = 0b01000010;
a[1] = 0b00100100;
a[2] = 0b00011000;
a[3] = 0b00100100;
a[4] = 0b01000010;
g.flip();

There is no way to 'just' draw text at the moment on ESP8266.

If you used a proper Espruino board you wouldn't have that problem as there's a Graphics class with lines, text, etc built-in.

But until someone manages to compile that into ESP8266 you're out of luck.