Mack's Domino Parlor

Mack's Domino Parlor is a simple dominoes game which is played against a computer opponent. The registered version offers many features (outlined in the included documentation) but the shareware lacks most of them. Including, apparently, color? The docs mention different color modes and color scheme choices but the game displays in gray and black only, at least in DOSBox. This may be the first instance of a shareware game requiring registration to view the game in color?! In any case, it's a working dominoes game where each player takes turns putting dominoes down.