This game is not actually a simulation of Pool, or Billiards or Snooker or any similar game, but uses the basic idea of those games to create a simplified version for the Spectrum. You only have six balls to pot, plus a cue ball, and all seven are the same colour. It seems a shame that the cue ball could not be a different colour. However the cue ball is distinct because the other six are numbered.
You must try to pot all six, scoring ten times the number on the ball for each pot. However if you pot your cue ball the game resets and you must start again. You also have three lives, and lose a life for each successive run of three misses. When all three lives have gone, the game starts again.
The game has a two-player option in which both players try to pot the same six balls. However unlike Pool proper, play does not pass to the other player when you miss your pot, but when three lives have been lost. This means that a player can take two free strokes to line up the cue ball before attempting your pot, so trying to snooker your opponent is a waste of time.
I think a game which attempts to simulate a real game should do a better job than this.