a rugby game

here is my new rugby themed game. it is for 2 players and takes about 10-15 minutes to play. the idea of the game was to make a 2 player push-your-luck tug of war that could be played on a tray table.

components: 1 pitch (a line of 18 spaces, including 2 try lines)
1 ball token (to move up and down the pitch)
1 possession die (marked 0-5. it is passed/advanced when possession changes)
2 scoring tracks (1 per player with a marker)
2 dice pools (5 dice each, 2 colours)

aim: to be the first player to score 15 points (by scoring goals or trys) or the player with the most points once possession has changed 6 times.

Play: roll 1 die each to see who starts in possession (offence) and who kicks off (defence)
after kick off offence will call either "passing play" or "kick". this is repeated until offence scores or loses possession.
if possession changes all dice are returned to their dice pools.

KICK OFF: defence rolls 1 die and moves the ball the ball that many spaces toward the offensive try line.

PASSING PLAY: offence rolls all the dice left in their dice pool, defence rolls all 5 dice.
first look at the offensive dice: remove any 6s from the pool.
put any 1s aside, they are still in the pool but will not count this turn.
if offence rolls 4 of a kind they must give defence a free kick (see below).
once all offensive dice have been assigned [not sure how to phrase that] look at the defensive dice.
for each pair defence can turn an offensive die into a 1, and set it aside.
if the pair matches the offensive die turn it into a 6 and remove it. (6s and 1s can not remove offensive dice)
if defence rolls 4 of a kind, offence takes a free kick. the 4 of a kind is then treated as 2 pairs.
once all dice have been assigned offence may advance the ball 1 space for each 2-5 offensive dice left.
if offence cannot advance they must either remove a die from their pool or move the ball back 2 spaces.
if all offensive dice have been removed defence gains possession.

KICK: offence chooses any number of dice in their dice pool, defense selects the same amount of dice and both players roll.
if both rolls are the same move the ball toward the offensive try line by the amount of dice offence chose to roll.
if defence rolled the highest combined total they gain possession.
if offence rolled higher they may either advance the ball equal to the difference between the two totals
-or- add a die back into their dice pool.
FREE KICK: roll 1 die and advance the ball toward the opposition try line that amount.
SCORING: offence scores 3 points if they kick the ball over the try line (drop goal) and 5 if they run the ball over the try line (try)
both players then roll 1 die each. if offence rolls higher they score 2 extra points (a conversion)
when a player scores, advance and move the possession die then put the ball on the center line and kick off again.