I had to look up what a point is before noticing it was hidden in your description.
As for finding the fun, I think the three abilities aren't designed well:
- Shooting the opponent isn't fun if you hit or miss and circumvents the gameplay
- Making the point a triple is always better than a point, so it will always be used
- Making the point better is almost always a good idea, so it will almost always be used
I also think the inherent concept doesn't lead to much fun:
- Getting 'nothing' rolls and being forced to lose with no control on your part is very unfun
- You always have the opponent at a disadvantage with rerolls and abilities
- There's a lot less tension than actual gambling since the amount you win and lose is fixed
- Being caught in a win-then-lose stalemate is unfun