diff --git a/app/scenes/cube_tube.rb b/app/scenes/cube_tube.rb
index 187c734..9b43d97 100644
--- a/app/scenes/cube_tube.rb
+++ b/app/scenes/cube_tube.rb
@@ -269,6 +269,7 @@ class CubeTubeGame < GameplayScene
       Sound.play(@args, :drop)
       if current_piece_colliding
         @gameover = true
+        Sound.play(@args, :train_stop2)
         Music.stop(@args)
       end
     else
diff --git a/app/scenes/intro.rb b/app/scenes/intro.rb
index 407f6b9..b348a90 100644
--- a/app/scenes/intro.rb
+++ b/app/scenes/intro.rb
@@ -5,7 +5,7 @@ class Intro < GameplayScene
   def initialize(args, opts = {})
     super
 
-    @train_duration = 200
+    @train_duration = 190
     @train_spline = [
       [1.0, 0.25, 0, 0]
     ]
@@ -26,26 +26,34 @@ class Intro < GameplayScene
       Scene.switch(args, :cube_tube, reset: true)
     end
 
-    @start ||= args.state.tick_count
+    now = args.state.tick_count
+
+    if @start.zero? || @start.nil?
+      @start = now
+      Sound.play(args, :train_stop)
+    end
+
     case @state
     when 0
-      if (args.state.tick_count - @start) > 60
-        @train_start = args.state.tick_count
+      if (now - @start) > 60
+        @train_start = now
         @state += 1
       end
     when 1
-      @train_pos = 1280 * args.easing.ease_spline(@train_start, args.state.tick_count, @train_duration, @train_spline)
+      @train_pos = 1280 * args.easing.ease_spline(@train_start, now, @train_duration, @train_spline)
       if @train_pos <= 0
         @state += 1
-        @wait_start = args.state.tick_count
+        @wait_start = now
+        Sound.play(args, :chime)
       end
     when 2
-      if (args.state.tick_count - @wait_start) > 60
-        @leave_start = args.state.tick_count
+      if (now - @wait_start) > 60
+        @leave_start = now
         @state += 1
+        Sound.play(args, :train_leave)
       end
     when 3
-      ease =  args.easing.ease_spline(@leave_start, args.state.tick_count, @leave_duration, @leave_spline)
+      ease = args.easing.ease_spline(@leave_start, now, @leave_duration, @leave_spline)
       @station_pos = @full_station_start_w * ease
 
       @screen_on = true if ease > 0.75
@@ -64,7 +72,7 @@ class Intro < GameplayScene
 
     if @screen_on
       screen_s =
-        case (args.state.tick_count % 32)
+        case (now % 32)
         when 0..7 then :screen_s1
         when 8..15 then :screen_s2
         when 16..23 then :screen_s3
diff --git a/app/scenes/main_menu.rb b/app/scenes/main_menu.rb
index 5f17bab..aede4c7 100644
--- a/app/scenes/main_menu.rb
+++ b/app/scenes/main_menu.rb
@@ -30,6 +30,16 @@ class MainMenu < MenuScene
     # actual menu logic is handled by the MenuScene super class
     super
 
+    Music.play(args, :ambience) if args.state.setting.music && Music.stopped(args)
+    @next_announcement ||= 0
+    if @next_announcement <= args.state.tick_count
+      next_sec = random(20..50)
+      @next_announcement = args.state.tick_count + (next_sec * 60)
+      sound = :"ambient#{random(1..6)}"
+      puts sound, Sound.for(sound).input
+      Sound.play(args, sound)
+    end
+
     # additionally draw some labels with information about the game
     labels = []
     labels << label(
diff --git a/app/util/util.rb b/app/util/util.rb
index b2b1e51..a2cbcdc 100644
--- a/app/util/util.rb
+++ b/app/util/util.rb
@@ -3,9 +3,19 @@
 
 # returns random val between min & max, inclusive
 # needs integers, use rand if you don't need min/max and don't care much
-def random(min, max)
-  min = Integer(min)
-  max = Integer(max)
+def random(a, b = nil)
+  min = 0
+  max = 1
+  if a.is_a?(Range)
+    min = a.begin
+    max = a.last(1)[0]
+  elsif a.is_a?(Numeric) && b.is_a?(Numeric)
+    min = Integer(a)
+    max = Integer(b)
+  else
+    min = 0
+    max = a
+  end
   rand((max + 1) - min) + min
 end
 
diff --git a/music/_list.rb b/music/_list.rb
index ec70bde..010ee48 100644
--- a/music/_list.rb
+++ b/music/_list.rb
@@ -2,7 +2,8 @@
 
 module Music
   MUSIC = {
-    music1: SoundInstance.new({ path: 'music/music1.ogg', looping: true }),
-    music2: SoundInstance.new({ path: 'music/music2.ogg', looping: true })
+    music1:   SoundInstance.new({ path: 'music/music1.ogg', looping: true }),
+    music2:   SoundInstance.new({ path: 'music/music2.ogg', looping: true }),
+    ambience: SoundInstance.new({ path: 'music/ambience1.ogg', looping: true })
   }
 end
diff --git a/music/ambience1.ogg b/music/ambience1.ogg
new file mode 100644
index 0000000..69eaeb1
Binary files /dev/null and b/music/ambience1.ogg differ
diff --git a/sounds/_list.rb b/sounds/_list.rb
index eb83cdd..2307981 100644
--- a/sounds/_list.rb
+++ b/sounds/_list.rb
@@ -2,12 +2,22 @@
 
 module Sound
   SOUNDS = {
-    menu:      SoundInstance.new({ path: 'sounds/menu.wav' }),
-    select:    SoundInstance.new({ path: 'sounds/select.wav' }),
-    clear:     SoundInstance.new({ path: 'sounds/clear.wav' }),
-    drop:      SoundInstance.new({ path: 'sounds/drop.wav' }),
-    move:      SoundInstance.new({ path: 'sounds/move.wav' }),
-    move_deny: SoundInstance.new({ path: 'sounds/move_deny.wav' }),
-    rotate:    SoundInstance.new({ path: 'sounds/rotate.wav' })
+    menu:        SoundInstance.new({ path: 'sounds/menu.wav' }),
+    select:      SoundInstance.new({ path: 'sounds/select.wav' }),
+    clear:       SoundInstance.new({ path: 'sounds/clear.wav' }),
+    drop:        SoundInstance.new({ path: 'sounds/drop.wav' }),
+    move:        SoundInstance.new({ path: 'sounds/move.wav' }),
+    move_deny:   SoundInstance.new({ path: 'sounds/move_deny.wav' }),
+    rotate:      SoundInstance.new({ path: 'sounds/rotate.wav' }),
+    train_stop:  SoundInstance.new({ path: 'sounds/train_stop.wav' }),
+    train_stop2: SoundInstance.new({ path: 'sounds/train_stop2.wav' }),
+    train_leave: SoundInstance.new({ path: 'sounds/train_leave.wav' }),
+    chime:       SoundInstance.new({ path: 'sounds/please_stand_clear.wav' }),
+    ambient1:    SoundInstance.new({ path: 'sounds/announcement.ogg', loop: false }),
+    ambient2:    SoundInstance.new({ path: 'sounds/announcement2.ogg', loop: false }),
+    ambient3:    SoundInstance.new({ path: 'sounds/announcement3.ogg', loop: false }),
+    ambient4:    SoundInstance.new({ path: 'sounds/announcements.ogg', loop: false }),
+    ambient5:    SoundInstance.new({ path: 'sounds/train_pass.ogg', loop: false }),
+    ambient6:    SoundInstance.new({ path: 'sounds/train_pass2.ogg', loop: false })
   }
 end
\ No newline at end of file
diff --git a/sounds/announcement.ogg b/sounds/announcement.ogg
new file mode 100644
index 0000000..a39a0f4
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diff --git a/sounds/announcement2.ogg b/sounds/announcement2.ogg
new file mode 100644
index 0000000..1798d58
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diff --git a/sounds/announcement3.ogg b/sounds/announcement3.ogg
new file mode 100644
index 0000000..cfba8cc
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diff --git a/sounds/announcements.ogg b/sounds/announcements.ogg
new file mode 100644
index 0000000..c186755
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diff --git a/sounds/please_stand_clear.wav b/sounds/please_stand_clear.wav
new file mode 100644
index 0000000..0b6f572
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diff --git a/sounds/train_leave.wav b/sounds/train_leave.wav
new file mode 100644
index 0000000..008037a
Binary files /dev/null and b/sounds/train_leave.wav differ
diff --git a/sounds/train_pass.ogg b/sounds/train_pass.ogg
new file mode 100644
index 0000000..bf2bd31
Binary files /dev/null and b/sounds/train_pass.ogg differ
diff --git a/sounds/train_pass2.ogg b/sounds/train_pass2.ogg
new file mode 100644
index 0000000..e083aaa
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diff --git a/sounds/train_stop.wav b/sounds/train_stop.wav
new file mode 100644
index 0000000..f204ed8
Binary files /dev/null and b/sounds/train_stop.wav differ
diff --git a/sounds/train_stop2.wav b/sounds/train_stop2.wav
new file mode 100644
index 0000000..6094801
Binary files /dev/null and b/sounds/train_stop2.wav differ
diff --git a/wip-assets/sounds/ambience1.ogg b/wip-assets/sounds/ambience1.ogg
new file mode 100644
index 0000000..82ee67b
Binary files /dev/null and b/wip-assets/sounds/ambience1.ogg differ
diff --git a/wip-assets/sounds/announcement.ogg b/wip-assets/sounds/announcement.ogg
new file mode 100644
index 0000000..fcb2484
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diff --git a/wip-assets/sounds/announcement2.ogg b/wip-assets/sounds/announcement2.ogg
new file mode 100644
index 0000000..494533d
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diff --git a/wip-assets/sounds/announcement3.ogg b/wip-assets/sounds/announcement3.ogg
new file mode 100644
index 0000000..d74afe0
Binary files /dev/null and b/wip-assets/sounds/announcement3.ogg differ
diff --git a/wip-assets/sounds/announcements.ogg b/wip-assets/sounds/announcements.ogg
new file mode 100644
index 0000000..1414360
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diff --git a/wip-assets/sounds/chime.wav b/wip-assets/sounds/chime.wav
new file mode 100644
index 0000000..7dc54d3
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diff --git a/wip-assets/sprites/tunnel-half.vox b/wip-assets/sprites/tunnel-half.vox
index d09b6ca..5367eab 100644
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