too many fouls?

[coach mb]

NFHS Basketball rule please
How many players must be on the floor to continue a game.

Situation ... team A with 7 players has 6 of them foul out. The game continued with player A inbounding the ball. Team B would take ball and eventually score. Player A repeated the sequence til time ended.

Here's the kicker ... team A won.
Game went almost 3 hours.
The level was 12 - 14 year old girls.