Thanks for the positive comments all, much appreciated!

xxxxx - thanks for the rules feedback. Take a look at the official Billiard Congress of America rules in the link above.

1. Lags are an optional rule only.
2. Push outs are correctly implemented, as far as my understanding of the rule!
3. It's three consecutive fouls in a game, not three accumulated.
4. Four numbered balls must hit cushion rule is not implemented.