Feature allowing shot to be taken again for practice
On shots that are really touch-and-go but you're sure you can make, its often gutting that you miss and can't recreate the conditions to try again. A feature to 'rewind' or reset the worms, landscape and wind to what it was before the shot was taken (i.e. allow it to be taken again) would be great for practice. Obviously only applicable to single player/fun games.
This is an excellent idea, but spent all my votes.