diff --git a/.gitignore b/.gitignore
index 05ba253..81b0c56 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 dev
 build/
 games/*
+!games/.gitkeep
+
diff --git a/lib/chroot.lua b/lib/chroot.lua
index 4d09f14..f0abb42 100644
--- a/lib/chroot.lua
+++ b/lib/chroot.lua
@@ -3,23 +3,34 @@ return function(ll)
 ll.mdir = nil
 ll.mgme = nil
 
+local ffi = require 'ffi'
+ffi.cdef [[
+  int PHYSFS_mount(const char *, const char *, int);
+  int PHYSFS_unmount(const char *);
+]]
+
+local baseReq = '?.lua;?/init.lua;'
 function ll.mount(gme)
-  --[[
-    ll.mdir = gme.base .. gme.dir
-    ll.mgme = gme
-    --[=[
-    if gme.main then
-      print('Load', ll.mdir ..'/'.. gme.main)
-    end
-    --]=]
-  --]]
-  error 'unimplemented'
+  local mdir = gme.base .. gme.dir
+  ll.mgme = gme
+
+  love.filesystem.setRequirePath(''
+    .. mdir .. '/?.lua;'
+    .. mdir .. '/?/init.lua;'
+    .. baseReq
+  )
+  -- FIXME: Bug may appear in Linux. Recompile Love2D or use official PPA.
+  if ffi.C.PHYSFS_mount(mdir, '/', 0) == 0
+  then error('Cannot mount '..mdir)
+    love.filesystem.setRequirePath(baseReq)
+  else ll.mdir = mdir
+  end
 end
 
 function ll.umount()
   if ll.mdir ~= nil then
+    ffi.C.PHYSFS_unmount(ll.mdir)
     ll.mdir = nil
-    error 'unimplemented'
   end
 end
 
diff --git a/lib/fs.lua b/lib/fs.lua
new file mode 100644
index 0000000..e6088c3
--- /dev/null
+++ b/lib/fs.lua
@@ -0,0 +1,20 @@
+return function(ll)
+
+function ll.fsIsAbs(f)
+  f = f:sub(1, 1)
+  return f == '/' or f == '\\'
+end
+
+function ll.fsIsRel(f)
+  return not ll.fsIsAbs(f)
+end
+
+function ll.fsFile(f)
+  return f:match '([^/\\]*)[/\\]*$'
+end
+
+function ll.fsDir(f)
+  return f:match '^(.*)[/\\]+[^/\\]*[/\\]*$'
+end
+
+end
diff --git a/lib/keyb.lua b/lib/keyb.lua
new file mode 100644
index 0000000..e3c0719
--- /dev/null
+++ b/lib/keyb.lua
@@ -0,0 +1,81 @@
+return function(ll)
+
+local mx, my, mb, mpb
+local dir, sc1, sc2, sclm
+
+-- d   - direction (h, v, x, y, *)
+-- c1  - coordinate before card (mouse) (be left or top)
+-- c2  - coordinate after  card (mouse) (be right or bottom)
+-- clm - other coordinate limit (mouse) (set -1 to disable)
+function ll.kbInit(d, c1, c2, clim)
+  if d == 'h' or d == 'v' or d == '*'
+  then dir = d
+  elseif d == 'y'
+  then dir = 'v'
+  elseif d == 'x'
+  then dir = 'h'
+  else error 'Direction must be *, h (x) or v (y)'
+  end
+
+  c1, c2 =
+    tonumber(c1) or 0,
+    tonumber(c2) or 0
+  sc1, sc2, sclm =
+    math.min(c1, c2),
+    math.max(c1, c2),
+    tonumber(clim) or -1
+end
+
+-- returns: <, >, o, m, nil
+-- ^ and v if dir is *
+function ll.kbGet()
+  assert(dir, 'Call ll.kbInit(dir, coord1, coord2, coordlimit) before')
+  mx, my = love.mouse.getPosition()
+  mpb = mb
+  if love.mouse.isDown(1) then mb = 1
+  else mb = 0
+  end
+
+  if love.keyboard.isScancodeDown('up', 'w')
+  then return dir == '*' and '^' or '<'
+
+  elseif love.keyboard.isScancodeDown('left', 'a')
+  then return '<'
+
+  elseif love.keyboard.isScancodeDown('down', 's')
+  then return dir == '*' and 'v' or '>'
+
+  elseif love.keyboard.isScancodeDown('right', 'd')
+  then return '>'
+
+  elseif love.keyboard.isScancodeDown('return', 'space')
+  then return 'o'
+
+  elseif love.keyboard.isDown 'menu'
+  then return 'm'
+
+  elseif mb == 0 and mpb == 1 then -- unpressed
+    if dir == 'h' then
+    if sclm < 0 or my <= sclm then
+      if mx <= sc1
+      then return '<'
+      elseif mx >= sc2
+      then return '>'
+      else return 'o'
+      end
+    end
+    else
+    if sclm < 0 or mx <= sclm then
+      if my <= sc1
+      then return '<'
+      elseif my >= sc2
+      then return '>'
+      else return 'o'
+      end
+    end
+    end
+
+  end
+end
+
+end
diff --git a/lib/load.lua b/lib/load.lua
index acc60dd..04a40e1 100644
--- a/lib/load.lua
+++ b/lib/load.lua
@@ -1,9 +1,51 @@
 return function(ll)
 
+function ll.addGame(file, cont)
+  local dir = ll.fsDir(file)
+  file = ll.fsFile(file)
+  local ext = file:match '%.(%w+)$'
+  print(file, ext, dir)
+  return 'NO!', nil
+end
+
 function ll.gameAdd(conf, file, base, dir)
   local gme = ll.gameNew(conf, file, base, dir)
+  gme.dat = {}
+
+  if gme.screens and gme.screens[1] then
+    gme.dat.scr = {}
+    for i = 1, #gme.screens do
+      table.insert(gme.dat.scr, love.graphics.newImage(ll.cfg.root .. gme.dir ..'/'.. gme.screens[i]))
+    end
+  end
+
   table.insert(ll.games, gme)
   return gme
 end
 
+local lfs = love.filesystem
+local info = lfs.getInfo
+
+for _, dir in pairs(love.filesystem.getDirectoryItems(ll.cfg.root)) do
+  local isDir
+  if info
+  then isDir = info(ll.cfg.root .. dir).type == 'directory'
+  else isDir = lfs.isDirectory(ll.cfg.root .. dir)
+  end
+
+  if isDir then
+    local file = ll.cfg.root .. dir..'/'.. 'info.ll'
+    local realDir = love.filesystem.getRealDirectory(file)
+      or love.filesystem.getRealDirectory(ll.cfg.root .. dir..'/main.lua')
+    if realDir
+    then ll.gameAdd(
+      love.filesystem.read(file),
+      file,
+      realDir ..'/'.. ll.cfg.root,
+      dir
+    )
+    end
+  end
+end
+
 end
diff --git a/lib/love/chroot.lua b/lib/love/chroot.lua
deleted file mode 100644
index 24d9cb5..0000000
--- a/lib/love/chroot.lua
+++ /dev/null
@@ -1,33 +0,0 @@
-return function(ll)
-
-local ffi = require 'ffi'
-ffi.cdef [[
-  int PHYSFS_mount(const char *, const char *, int);
-  int PHYSFS_unmount(const char *);
-]]
-
-function ll.mount(gme)
-  local mdir = gme.base .. gme.dir
-
-  love.filesystem.setRequirePath(''
-    .. mdir .. '/?.lua;'
-    .. mdir .. '/?/init.lua;'
-    .. '?.lua;?/init.lua;'
-  )
-  -- FIXME: Bug may appear in Linux. Recompile Love2D or use official PPA.
-  if ffi.C.PHYSFS_mount(mdir, '/', 0) == 0
-  then error 'Cannot mount'
-  else
-    ll.mdir = mdir
-    ll.mgme = gme
-  end
-end
-
-function ll.umount()
-  if ll.mdir ~= nil then
-    ffi.C.PHYSFS_unmount(ll.mdir)
-    ll.mdir = nil
-  end
-end
-
-end
diff --git a/lib/love/load.lua b/lib/love/load.lua
deleted file mode 100644
index 787d1d7..0000000
--- a/lib/love/load.lua
+++ /dev/null
@@ -1,28 +0,0 @@
-return function(ll)
-
-  function ll.gameAdd(conf, file, base, dir)
-    local gme = ll.gameNew(conf, file, base, dir)
-    gme.dat = {}
-
-    if gme.screens and gme.screens[1] then
-      gme.dat.scr = {}
-      for i = 1, #gme.screens do
-        table.insert(gme.dat.scr, love.graphics.newImage(ll.cfg.root .. gme.dir ..'/'.. gme.screens[i]))
-      end
-    end
-
-    table.insert(ll.games, gme)
-    return gme
-  end
-
-for _, dir in pairs(love.filesystem.getDirectoryItems(ll.cfg.root)) do
-  local file = ll.cfg.root .. dir..'/'.. 'info.ll'
-  ll.gameAdd(
-    love.filesystem.read(file),
-    file,
-    love.filesystem.getSource():match '(.*)[\\/]*' ..'/'.. ll.cfg.root, -- TODO: AppData folders support
-    dir
-  )
-end
-
-end
diff --git a/lib/main.lua b/lib/main.lua
index 86d4169..dee7506 100644
--- a/lib/main.lua
+++ b/lib/main.lua
@@ -4,24 +4,24 @@ ll.cfg = {
   root = 'games/',
 }
 
+require 'lib.fs'     (ll)
 require 'lib.game'   (ll)
 require 'lib.chroot' (ll)
 require 'lib.load'   (ll)
+require 'lib.keyb'   (ll)
 
 function ll.home()
   ll.umount()
-  error 'go to home'
+  love.event.push('quit', 'restart')
 end
 
-if love then
-  require 'lib.love.chroot' (ll)
-  require 'lib.love.load'   (ll)
-
-  function ll.home()
-    ll.umount()
-    love.event.push('quit', 'restart')
+ll.dt = false
+function ll.devtools()
+  if not ll.dt then
+    ll.dt = true
+    __LL = ll
+    pcall(function() require 'dev.tools' end)
   end
-  llHome = ll.home
 end
 
 return ll
diff --git a/ll-min.lua b/ll-min.lua
index 37edda9..eafd105 100644
--- a/ll-min.lua
+++ b/ll-min.lua
@@ -1,8 +1,17 @@
--- minimal Love Loader API
+-- Minimal Love Loader API
+-- Version 2.1
+-- (c) Er2 2022 <er2@dismail.de>
+-- Zlib License
 
 if not llUsed then
 
 COLDIV = love.getVersion() == 0 and 1 or 255
+MOBILE = love.system.getOS() == 'Android'
+  or love.system.getOS() == 'iOS'
+
+if MOBILE
+then love.window.setFullscreen(true)
+end
 
 function love.resize(x, y)
   W, H = x, y
diff --git a/luapack.lua b/luapack.lua
index f4ab5ff..ab4dec7 100644
--- a/luapack.lua
+++ b/luapack.lua
@@ -9,6 +9,7 @@ return {
         'llHome',
         'resize',
         'COLDIV',
+        'MOBILE',
         'W', 'H',
       }
     },
diff --git a/readme.md b/readme.md
index b14a9b3..f0871b3 100644
--- a/readme.md
+++ b/readme.md
@@ -15,8 +15,7 @@ with custom event handling and redrawing.
 
 # LibLL
 
-Love Loader from v2.0 includes library to simplify creating custom interfaces.
-It is like a backend for Love Loader.
+Love Loader from 2.0 includes backend API to simplify creating custom skins.
 
 It have not so many functions and fields:
 
@@ -43,7 +42,9 @@ It have not so many functions and fields:
 
   Creates game object (defined above) and returns it.
 
-- `ll.gameAdd(conf, file, base, dir)` - same as `ll.gameNew`, but inserts game into `ll.games`.
+- `ll.gameAdd(conf, file, base, dir)` - same as `ll.gameNew` with insertion into `ll.games`.
+
+- `ll.addGame(fileName, fileContent)` - function for file dropping, reserved for v3.0.
 
 - `ll.mount(game)` - mounts game.
 
@@ -57,11 +58,29 @@ It have not so many functions and fields:
 
 - `ll.home()` - calls `llHome`
 
+- `ll.dt` - is developer tools enabled?
+
+- `__LL` - global variable of Love Loader instance when developer tools enabled.
+
+- `ll.devtools()` - enable developer tools.
+
+- `ll.fsIsAbs(file)` - is file absolute (/file)?
+
+- `ll.fsIsRel(file)` - is file relative, inverted result of ll.fsIsAbs (./file).
+
+- `ll.fsDir(path)` - get directory name (2 from /1/2/3.file).
+
+- `ll.fsFile(path)` - get file (including dividers after) (2 from /1/2/).
+
+- `ll.kbInit(direction --[[string: *, h, v, x, y]], c1 --[[number, coordinate before card for mouse (left/top)]], c2 --[[number, coordinate after card for mouse (right/bottom)]], clim --[[other coordinate limit for mouse or -1 to disable]])` - initialize keyboard module for skins.
+
+- `ll.kbGet() --[[nil, string: <, >, o, m, ^ anv v if direction is *]]` - get key pressed.
+
 # API
 
-To simplify task to the game developers, this loader creates some global variables to use.
+To reduce things to do for game developers, this loader creates some global variables to use.
 
-You can also use it without Love Loader by including `ll-min.lua` file.
+You can also use it without Love Loader (or if your game can distribute without loader) by including `ll-min.lua` file.
 
 `W` and `H`: width and height of the screen which controls by custom love.resize function.
 
@@ -75,6 +94,8 @@ You can also use it without Love Loader by including `ll-min.lua` file.
 
 `COLDIV`: color divider (1 or 255) to `love.graphics.setColor` function.
 
+`MOBILE`: is this device runs Android or iOS?
+
 # Fill game information
 
 To fill game information in game folder need to create `info.ll` file.
@@ -89,3 +110,4 @@ desc = Some descripion about the game.
 pic = screen.png
 pics = [ screen.png; screen2.png ] # wow arrays
 ```
+
diff --git a/skins/gui.lua b/skins/gui.lua
index 10f6c67..fdb2708 100644
--- a/skins/gui.lua
+++ b/skins/gui.lua
@@ -1,7 +1,5 @@
 return function(ll)
 
--- Classic UI from Love Loader v1
-
 ll.cfg.pcht = ll.cfg.pcht or 60 * 5
 
 local pikchv, pikcha = 0, 0
@@ -10,8 +8,8 @@ local pikchao = math.floor(1 / ll.cfg.pcht * 2 * 255 + 0.5)
 local cx, cy, cw, ch
 local f, bf
 
-local mx, mb, mpb = 0, 0, 0
-local cdir, sel = 0, 1
+local sel = 1
+local cdir
 
 function resize()
   cw = W / 1.25
@@ -23,40 +21,25 @@ function resize()
 
   f  = love.graphics.newFont(th / 3)
   bf = love.graphics.newFont(th / 2)
+
+  ll.kbInit('h', cx, cx + cw)
 end
 
 local function update()
-  mx = love.mouse.getX()
-  mpb = mb
-  if love.mouse.isDown(1) then mb = 1
-  else mb = 0 end
-
-  local sdi = 0
-  if mpb == 1 and mb == 0 then
-    if mx <= cx
-    then sdi = 1
-    elseif mx >= cx + cw
-    then sdi = 2
-    else sdi = 3
-    end
-  end
-
-  if love.keyboard.isScancodeDown('left', 'a')
-  then sdi = 1
-  elseif love.keyboard.isScancodeDown('right', 'd')
-  then sdi = 2
-  elseif love.keyboard.isScancodeDown('return', 'space')
-  then sdi = 3
-  end
+  local sdi = ll.kbGet()
 
   if cdir ~= sdi then
     cdir = sdi
-    if sdi == 1
+    if sdi == '<'
     then sel = sel - 1
-    elseif sdi == 2
+    elseif sdi == '>'
     then sel = sel + 1
-    elseif sdi == 3 and ll.games[sel]
+    elseif sdi == 'o' and ll.games[sel]
     then ll.mount(ll.games[sel])
+
+    elseif sdi == 'm'
+    and love.mouse.getX() >= W - 8
+    then ll.devtools()
     end
 
     if sel < 1 then sel = #ll.games end
@@ -78,11 +61,6 @@ local function update()
     end
   else pikcha = math.min(255, pikcha + pikchao)
   end
-
-  if love.keyboard.isDown 'menu'
-  and mx >= W - 8
-  then pcall(select(2, pcall(require, 'dev.devtools')), ll)
-  end
 end
 
 local tm = 0
diff --git a/skins/psp.lua b/skins/psp.lua
index fc4a34e..2427148 100644
--- a/skins/psp.lua
+++ b/skins/psp.lua
@@ -15,6 +15,9 @@ ll.cfg.pcht = ll.cfg.pcht or 60 * 5
 local pikchv, pikcha = 0, 0
 local pikchao = math.floor(1 / ll.cfg.pcht * 2 * 255 + 0.5)
 
+local logger = ''
+local chc = '<>><m><'
+
 function resize()
   r = math.min(W, H) / 30
 
@@ -26,57 +29,38 @@ function resize()
 
   f = love.graphics.setNewFont(math.min(W, H) / 30)
   bf = love.graphics.newFont(math.min(W, H) / 20)
+
+  ll.kbInit('v', H / 2 - ch, H / 2 + ch + cg, cx + cw * 2)
 end
 
 love.window.setMode(800, 600, {resizable = true})
 
-local my, mb, mpb
-
-local sdir = 0
+local sdir
 local function update()
   local ty = H / 2 - (ch + cg) * sel
   cy   = cy  + (ty - cy) * 0.1
   css  = css + (2 - css) * 0.2
   rcss = 2 - css + 1
 
-  local sdi
-
-  my = love.mouse.getY()
-  mpb = mb
-  if love.mouse.isDown(1) then mb = 1
-  else mb = 0
-  end
-  if mb == 0 and mpb == 1 then
-    if my <= H / 2 - ch
-    then sdi = 1
-    elseif my >= H / 2 + ch + cg
-    then sdi = 2
-    else sdi = 3
-    end
-  elseif love.keyboard.isScancodeDown('up', 'w')
-  then sdi = 1
-  elseif love.keyboard.isScancodeDown('down', 's')
-  then sdi = 2
-  elseif love.keyboard.isScancodeDown('return', 'space')
-  then sdi = 3
-  else sdi = 0
-  end
+  local sdi = ll.kbGet()
 
   if sdi ~= sdir then
-    if sdi ~= 0
+    if sdi
     then rcss = css
       css = 1
-      if sdi == 3
-      then css = 1.5
-      end
       psel = sel
+      logger = logger .. sdi
+      if logger == chc then
+        resize()
+        ll.devtools()
+      end
     end
     sdir = sdi
-    if sdi == 1
+    if sdi == '<'
     then sel = sel - 1
-    elseif sdi == 2
+    elseif sdi == '>'
     then sel = sel + 1
-    elseif sdi == 3 and ll.games[sel]
+    elseif sdi == 'o' and ll.games[sel]
     then ll.mount(ll.games[sel])
     end