Recall should mean better things are about to happen not the fun stops here. Which is what happens when most dogs are recalled.
14 wee old puppy you have at least 3 occasions every day at meal times to practice recall.
Practice recall at home before you take it out and about.
Recall means a fast run back to you do not be happy with a potter and a mooch on the way - if you are you will have mega recall issues later on down the line.
There is no way on earth you can make yourself more exciting that the environment eg squirels other dogs etc so work on making recall a reflex response.
Set your dog up to win so never recall if there is a chance your dog will not take any notice. Only call when you can work really hard to get the fast run back to your response. So have energy toys food, high pitched exciting voice and the ability to run away from the dog to boost the recall.
If he is not reliable use a long lead - I totally disagree that flexi leads are ok if used correctly that is the whole problem with them, they break however you are using them. Do not use a flexi lead.
Long line should be on a harness
Build up your ability to play with your dog, tuggies, chase toys are all great and will help with your recall a lot.
It is best to have your pupy off lead from day one (if in a safe area) they get into the habit of following you and that helps with the foundations of recall.