Its a little unusual so here's a brief summary

Rules
It is 10 overs
8 a side
Keeper can't bowl
50% of the team must bowl, Max 2 overs per bowler
Batters retire on 15 - Can come back in when rest of team out
No LBW ( unless very deliberate)
2 runs will be awarded to the batting team for every wide or no ball bowled.( no additional balls unless in the last over)

Scoring
1 Run - Ball hits wall
2 runs - 1 physical run
2 runs - wide or no ball
3 runs - Ball hits wall and batters run
4 runs - ball hits back wall
6 runs - ball hits back wall ( no bounce)
and...
1 run if over throw hits wall
minus 5 yes minus 5 if ball hits roof directly

and you can be caught off the walls ( but not the ceiling or back wall)

Good luck to the scorers