While Dominoes 4.0 is rather nicely put together, it's obvious to me after giving it a good "test drive" that the game is programmed to give the computer a big advantage over the one who plays against it, even in easy mode.
When I would place the initial domino at the start of a game, the computer virtually always had a matching tile, whereas quite a few of times when the computer placed the first one, I didn't have a matching tile and had to draw another one or more.
Then, at a number of times during the games, I was unable to place a matching tile and had to keep drawing additional ones, sometimes about eight or so one after the other 'till I was able to come up with a matching one; then the computer(opponent) would too often play out its tiles, leaving me with tiles containing a high number of pips, giving it, the "opponent", 40-70 points. Only extremely rarely did this happen to the computer.
Over all, the computer seemed to come up with matching tiles far more often than I.
For these reasons, I decided not to purchase it, although I'm also ambivalent about whether or not it's worth $20.
At any rate, I'd like to see a mode of play available, in Dominoes 4.0, in which the computer's dominoes are chosen in totally random fashion, to reflect playing in the real world.