diff --git a/.DS_Store b/.DS_Store
index 6c1a93c..81dee74 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/assets/.DS_Store b/assets/.DS_Store
new file mode 100644
index 0000000..bd83215
Binary files /dev/null and b/assets/.DS_Store differ
diff --git a/assets/game-over.wav b/assets/game-over.wav
new file mode 100644
index 0000000..f4bae3a
Binary files /dev/null and b/assets/game-over.wav differ
diff --git a/assets/jump.wav b/assets/jump.wav
new file mode 100644
index 0000000..316e660
Binary files /dev/null and b/assets/jump.wav differ
diff --git a/assets/loop.wav b/assets/loop.wav
new file mode 100644
index 0000000..2617637
Binary files /dev/null and b/assets/loop.wav differ
diff --git a/assets/loop2.wav b/assets/loop2.wav
new file mode 100644
index 0000000..5cb665f
Binary files /dev/null and b/assets/loop2.wav differ
diff --git a/assets/loop3.wav b/assets/loop3.wav
new file mode 100644
index 0000000..5717ff7
Binary files /dev/null and b/assets/loop3.wav differ
diff --git a/lib/game.lua b/lib/game.lua
index 27e3dfb..e841734 100644
--- a/lib/game.lua
+++ b/lib/game.lua
@@ -64,15 +64,16 @@ function Game:update_obstacles(dt)
           else
             table.insert(self.obstacles_2, 1)
           end
-          if self.obstacle_interval > 0.5 then
-            self.obstacle_interval = self.obstacle_interval - math.random(0, self.obstacle_interval/3)
-          else
-            self.obstacle_interval = math.random(0.5, 3)
-          end
 
           self.obstacle_countdown = self.obstacle_countdown + self.obstacle_interval
      end
 
+      if self.obstacle_interval > 0.3 then
+          self.obstacle_interval = self.obstacle_interval - math.random(0, self.obstacle_interval/2)
+        else
+          self.obstacle_interval = math.random(0.2, 3)
+        end
+
   local threshold = 0.05
   local cutoff = 0.5
 
diff --git a/main.lua b/main.lua
index 3c608f1..4075107 100644
--- a/main.lua
+++ b/main.lua
@@ -27,6 +27,12 @@ function love.load()
     -- Dimensions.
     width, height = love.graphics.getDimensions()
     print('Running in '..width..'x'..height..' mode.')
+
+    jump_sound = love.audio.newSource("assets/jump.wav", "static")
+    over_sound = love.audio.newSource("assets/game-over.wav", "static")
+    music = love.audio.newSource("assets/loop.wav")
+    music2 = love.audio.newSource("assets/loop2.wav")
+    music3 = love.audio.newSource("assets/loop3.wav")
 end
 
 
@@ -200,6 +206,7 @@ function draw_death()
 
     love.graphics.setColor(255, 0, 0)
     love.graphics.printf('GAME OVER', 0, height/2, width, 'center')
+    over_sound:play()
   end
 end
 
@@ -220,7 +227,13 @@ end
 
 -- Jump!
 function jump(dt)
+  if game.dead then
+    over_sound:stop()
+    game:initialize()
+  end
+
   game:jump(dt)
+  jump_sound:play()
 end
 
 -- iOS touchscreen support.
@@ -229,6 +242,24 @@ function love.touchpressed(id, x, y, dx, dy, pressure)
 end
 
 function love.update(dt)
+  if game.progress < 1 then
+    music:play()
+  else
+    music:stop()
+    music2:play()
+  end
+  if game.stretch_progress > 1 then
+    music2:stop()
+    music3:play()
+  end
+
+  if game.dead then
+    music:stop()
+    music2:stop()
+    music3:stop()
+
+  end
+
   -- Update the controller.
   TLbind:update()