How work the banglejs 2 and what are our possibilities with it?

Hi - just as a quick test, if you do:

Bangle.on('touch', (b,e) => {
  e.x += 20;
  e.altered = true; // a new field
});

Bangle.on('touch', (b,e) => {
  print(e);
  g.clear(1).fillCircle(e.x, e.y, 5);
});

It appears to be working, printing stuff like { "x": 64, "y": 25, "type": 0, "altered": true }.

But yes, if you can show us what you've got we can take a look. Adding a field to the object is a good way to see if you've been able to actually change what's in it...