How to use the Bangle.js Layout library

@NebbishHacker, tried to run your Web-linked code in the emulator and get:

>
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v10.9 (c) 2021 G.Williams
>
>Execution Interrupted
at line 210 col 4
  });
   ^
in function called from line 215 col 4
})();
   ^
New interpreter error: LOW_MEMORY,MEMORY
>Uncaught Error: Cannot read property 'canvas' of undefined
 at line 221 col 18
let canvas = trui.canvas();
                 ^
>Uncaught Error: Cannot read property 'render' of undefined
 at line 235 col 9
  canvas.render(
        ^
in function "draw" called from line 265 col 6
draw();
     ^
in function "tick" called from line 276 col 6
tick();
     ^
>

What do I miss here?

(See no reason why it should not run in the emulator.)