diff --git a/data/animations.lua b/data/animations.lua
index 823bc6a..2d2be1a 100644
--- a/data/animations.lua
+++ b/data/animations.lua
@@ -33,4 +33,12 @@ animations = {
             { frame={x=48,y=0,w=16,h=17}, wait=4, reversed=true }
         }
     },
+    ["mummy_walk"] = {
+        cycle = {1,2,1,3},
+        frames = {
+            { frame={x=0,y=24,w=16,h=17}, wait=4 },
+            { frame={x=16,y=24,w=16,h=17}, wait=4 },
+            { frame={x=32,y=24,w=16,h=17}, wait=4 }
+        }
+    },
 }
\ No newline at end of file
diff --git a/data/game.lua b/data/game.lua
index 0b6b64d..da7504d 100644
--- a/data/game.lua
+++ b/data/game.lua
@@ -18,7 +18,7 @@ game = {
         -- Pintar el mapa i sprites
         rooms.draw()
 		sprites.update()
-        sprites.update_hero()
+        --sprites.update_hero()
 
         if key.press(key.ESCAPE) or key.press(key.F9) then
             editor.enable()
@@ -29,6 +29,7 @@ game = {
         game.chg_adv.x = x
         game.chg_adv.y = y
         game.chg_step = 8
+        sprites.pause_ia = true
         app.push(game.update_change_room)
     end,
 
@@ -48,6 +49,7 @@ game = {
 		sprites.update()
         game.chg_step = game.chg_step - 1
         if game.chg_step == 0 then
+            sprites.pause_ia = false
             app.pop()
         end
     end
diff --git a/data/rooms_foreground.bin b/data/rooms_foreground.bin
index cd81274..06f2c0f 100644
Binary files a/data/rooms_foreground.bin and b/data/rooms_foreground.bin differ
diff --git a/data/sprites.lua b/data/sprites.lua
index b2d90e4..5be3bc1 100644
--- a/data/sprites.lua
+++ b/data/sprites.lua
@@ -3,19 +3,32 @@ require "animations"
 sprites = {
     hero = nil,
     list = {},
+    pause_ia = false,
 
     init = function()
         sprites.hero = {
             pos = { x=28, y=4*12*8+71 },
             size= { w=16, h=17 },
             bbo = { left=0, top=0, right=0, bottom=0 },
-            flipped = false,
-            jumping = 0,
-            animation = "hero_stand",
-            stairs = false,
             current_frame = 1,
-            current_wait = 1
+            current_wait = 1,
+            flipped = false,
+            animation = "hero_stand",
+            ia = sprites.update_hero,
+            jumping = 0,
+            stairs = false
         }
+        local mummy = {
+            pos = { x=100, y=4*12*8+71 },
+            size = { w=16,h=17 },
+            bbo = { left=0, top=0, right=0, bottom=0 },
+            current_frame = 1,
+            current_wait = 1,
+            flipped = true,
+            animation = "mummy_walk",
+            ia = sprites.update_mummy
+        }
+        table.insert(sprites.list, mummy)
     end,
 
     set_animation=function(sprite, animation)
@@ -35,27 +48,51 @@ sprites = {
     end,
 
     update = function()
+        if not sys.beat() then return end
         sprites.update_sprite(sprites.hero)
+        for i,v in ipairs(sprites.list) do
+            sprites.update_sprite(v)
+        end
+        if not sprites.pause_ia then
+            sprites.hero.ia()
+            for i,v in ipairs(sprites.list) do
+                v.ia(v)
+            end
+        end
     end,
 
     update_sprite = function(sprite)
-        if sys.beat() then
-            sprite.current_wait = sprite.current_wait - 1
-            if sprite.current_wait == 0 then
-                if sprite.current_frame < #animations[sprite.animation].cycle then
-                    sprite.current_frame = sprite.current_frame + 1
-                else
-                    sprite.current_frame = 1
-                end
-                local cycle = animations[sprite.animation].cycle[sprite.current_frame]
-                sprite.current_wait = animations[sprite.animation].frames[cycle].wait
+        sprite.current_wait = sprite.current_wait - 1
+        if sprite.current_wait == 0 then
+            if sprite.current_frame < #animations[sprite.animation].cycle then
+                sprite.current_frame = sprite.current_frame + 1
+            else
+                sprite.current_frame = 1
+            end
+            local cycle = animations[sprite.animation].cycle[sprite.current_frame]
+            sprite.current_wait = animations[sprite.animation].frames[cycle].wait
+        end
+    end,
+
+    update_mummy = function(spr)
+        if spr.flipped then
+            local tx, ty = (spr.pos.x+3)>>3, (spr.pos.y+16)>>3
+            if map.tile(tx,ty) < 16 and map.tile(tx,ty-1) < 16 and map.tile(tx,ty+1) > 0 then
+                spr.pos.x = spr.pos.x - 1
+            else
+                spr.flipped = not spr.flipped
+            end
+        else
+            local tx, ty = (spr.pos.x+12)>>3, (spr.pos.y+16)>>3
+            if map.tile(tx,ty) < 16 and map.tile(tx,ty-1) < 16 and map.tile(tx,ty+1) > 0 then
+                spr.pos.x = spr.pos.x + 1
+            else
+                spr.flipped = not spr.flipped
             end
         end
     end,
 
     update_hero = function()
-        if not sys.beat() then return end
-
         -- Update hero
         local anim = "hero_stand"
         local move_anim = "hero_walk"
@@ -68,7 +105,7 @@ sprites = {
             --draw.rect(tx1<<3,ty<<3,8,8,8)
             --draw.rect(tx2<<3,ty<<3,8,8,28)
             if map.tile(tx1,ty) == 0 and map.tile(tx2,ty) == 0 then
-                if ty<rooms.pos.y then
+                if ty+1<rooms.pos.y then
                     game.change_room(0,-1)
                 else
                     if sprites.hero.jumping > 1 then sprites.hero.pos.y = sprites.hero.pos.y - 1 end
@@ -87,7 +124,7 @@ sprites = {
                     anim = move_anim
                     local tx1, tx2, ty = (sprites.hero.pos.x+4)>>3, (sprites.hero.pos.x+11)>>3, (sprites.hero.pos.y)>>3
                     if map.tile(tx1,ty) < 16 or map.tile(tx2,ty) < 16 then
-                        if ty<rooms.pos.y then
+                        if ty+1<rooms.pos.y then
                             game.change_room(0,-1)
                         else
                             sprites.hero.pos.y = sprites.hero.pos.y - 1
@@ -169,7 +206,9 @@ sprites = {
 
     draw = function()
         surf.source(surf_sprites)
-
+        for i,v in ipairs(sprites.list) do
+            sprites.draw_sprite(v)
+        end
         sprites.draw_sprite(sprites.hero)
     end,