Just got the game, looks fantastic.
Reading the rules, is there anything to define what counts as a flick and what doesn't?
The pen-flicking games I used to play in school would often turn into debates about what counted as a proper flick - but maybe this just isn't an issue at all.
I think it's mainly left to what the players feel comfortable with. Some people just can't get the hang of it. It's kind of like sports in that you have a bit of a friendly agreement to act in a sportsmanlike way.
My friend just cannot get the hang of the "make an okay sign, put pressure on your index finger until it's released" method. So he always just stick out his index finger and gives a quick jab.