Here could be a first solution (since it can be improved, e.g. by hiding/displaying the more/less links):
<div ng-repeat="score in scores | limitTo: limit">
...
</div>
<a href ng-click="incrementLimit()">more</a>
<a href ng-click="decrementLimit()">less</a>
In your controller:
var limitStep = 5;
$scope.limit = limitStep;
$scope.incrementLimit = function() {
$scope.limit += limitStep;
};
$scope.decrementLimit = function() {
$scope.limit -= limitStep;
};