The leaderboard view is designed to generate a list of the players and their current score:

function (doc) {
  if (doc.jsonType == "player") {
  emit(doc.experience, null);
  }
}

The view looks for records with a jsonType of "player", and then outputs the experience field of each player record. Because the output from views is naturally sorted by the key value, the output of the view will be a sorted list of the players by their score. For example:

{
   "total_rows" : 81,
   "rows" : [
      {
         "value" : null,
         "id" : "Bob0",
         "key" : 1
      },
      {
         "value" : null,
         "id" : "Dustin2",
         "key" : 1
      },
…
      {
         "value" : null,
         "id" : "Frank0",
         "key" : 26
      }
   ]
}

To get the top 10 highest scores (and ergo players), you can send a request that reverses the sort order (by using descending=true, for example:

http://127.0.0.1:8092/gamesim-sample/_design/dev_players/_view/leaderboard?descending=true&connection_timeout=60000&limit=10&skip=0

Which generates the following:

{
   "total_rows" : 81,
   "rows" : [
      {
         "value" : null,
         "id" : "Tony0",
         "key" : 23308
      },
      {
         "value" : null,
         "id" : "Sharon0",
         "key" : 20241
      },
      {
         "value" : null,
         "id" : "Damien0",
         "key" : 20190
      },
…
      {
         "value" : null,
         "id" : "Srini0",
         "key" :9
      },
      {
         "value" : null,
         "id" : "Aliaksey1",
         "key" : 17263
      }
   ]
}