does puck support usb hid

Yes, you can. Although by Bluetooth, not USB (as there's not USB port!).

For some reason it doesn't seem to be listed (yet) in the Bluetooth HID docs at

But you can just do:

var mouse = require("ble_hid_mouse");
NRF.setServices(undefined, { hid : mouse.report });

setWatch(function(){
  mouse.send(0,0,mouse.BUTTONS.LEFT); // X movement, Y movement, buttons pressed
}, BTN, {repeat:true});