[Coco] new Butterflies demo

[Robert Gault]

Roger Taylor wrote:
> Someone is testing the semi-final version of the game with joystick 
> support.  A new demo copy has overwritten the ones on coco3.com, so grab 
> the new files if you want to see it.  Mary now superimposes over the 
> trees with no sprite masking other than an OR mix.
> 
> Music on/off  (sound effects still play)
> Keyboard and/or joystick mode
> 50hz/60hz modes  autodetected from patched CoCo 3 ROMs and selectable 
> from the menu
> RGB and CMP modes
> 
> VCC compatible
> M.E.S.S. compatible
> 
> www.coco3.com

Looking very good! I do hear a slight "ticking" which I assume is the 
DAC being switched between joystick and audio, but it is minimal and not 
a problem.

Should I assume the demo only has the joystick button active and not the 
  stick itself? That's what I'm seeing.