Started playing menu music on WorldMapView. Only go full-screen on squat windows where we really need it (see #1669).

app/lib/surface/MusicPlayer.coffee

@@ -77,4 +77,5 @@ module.exports = class MusicPlayer extends CocoClass
 
   destroy: ->
     me.off 'change:music', @onMusicSettingChanged, @
+    @fadeOutCurrentMusic()
     super()

app/views/play/WorldMapView.coffee

@@ -5,6 +5,8 @@ CocoCollection = require 'collections/CocoCollection'
 AudioPlayer = require 'lib/AudioPlayer'
 PlayLevelModal = require 'views/play/modal/PlayLevelModal'
 ThangType = require 'models/ThangType'
+MusicPlayer = require 'lib/surface/MusicPlayer'
+storage = require 'lib/storage'
 
 class LevelSessionsCollection extends CocoCollection
   url: ''
@@ -37,6 +39,9 @@ module.exports = class WorldMapView extends RootView
     @getLevelPlayCounts()
     $(window).on 'resize', @onWindowResize
     @playAmbientSound()
+    @probablyCachedMusic = storage.load("loaded-menu-music-#{@terrain}")
+    musicDelay = if @probablyCachedMusic then 1000 else 10000
+    @playMusicTimeout = _.delay (=> @playMusic() unless @destroyed), musicDelay
     @preloadTopHeroes()
     @hadEverChosenHero = me.get('heroConfig')?.thangType
 
@@ -45,6 +50,8 @@ module.exports = class WorldMapView extends RootView
     if ambientSound = @ambientSound
       # Doesn't seem to work; stops immediately.
       createjs.Tween.get(ambientSound).to({volume: 0.0}, 1500).call -> ambientSound.stop()
+    @musicPlayer?.destroy()
+    clearTimeout @playMusicTimeout
     super()
 
   getLevelPlayCounts: ->
@@ -202,6 +209,12 @@ module.exports = class WorldMapView extends RootView
     @ambientSound = createjs.Sound.play src, loop: -1, volume: 0.1
     createjs.Tween.get(@ambientSound).to({volume: 1.0}, 1000)
 
+  playMusic: ->
+    @musicPlayer = new MusicPlayer()
+    musicFile = {Dungeon: '/music/music-menu-dungeon', Grass: '/music/music-menu-grass'}[@terrain]
+    Backbone.Mediator.publish 'music-player:play-music', play: true, file: musicFile
+    storage.save("loaded-menu-music-#{@terrain}", true) unless @probablyCachedMusic
+
   preloadTopHeroes: ->
     for heroID in ['captain', 'knight']
       url = "/db/thang.type/#{ThangType.heroes[heroID]}/version"

app/views/play/modal/PlayLevelModal.coffee

@@ -106,7 +106,7 @@ module.exports = class PlayLevelModal extends ModalView
     return if @$el.find('#play-level-button').prop 'disabled'
     @showLoading()
     ua = navigator.userAgent.toLowerCase()
-    unless hasGoneFullScreenOnce or (/safari/.test(ua) and not /chrome/.test(ua))
+    unless hasGoneFullScreenOnce or (/safari/.test(ua) and not /chrome/.test(ua)) or $(window).height() >= 658  # Min vertical resolution needed at 1366px wide
       @toggleFullscreen()
       hasGoneFullScreenOnce = true
     @updateConfig =>