diff --git a/.luarc.json b/.luarc.json
index 825018e..a4cb138 100644
--- a/.luarc.json
+++ b/.luarc.json
@@ -4,5 +4,6 @@
   "workspace.library": ["../love2d-luacats"],
   "runtime.special": {
     "love.filesystem.load": "loadfile"
-  }
+  },
+  "workspace.ignoreDir": ["dev_utils"]
 }
diff --git a/assets/tiles/grass/manifest.lua b/assets/tiles/grass/manifest.lua
index ab5b777..4eca310 100644
--- a/assets/tiles/grass/manifest.lua
+++ b/assets/tiles/grass/manifest.lua
@@ -1,6 +1,121 @@
 return {
-    tilewidth = 32,
-    tileheight = 32,
-    spacing = 0,
-    margin = 0,
-}
\ No newline at end of file
+    tile_size = 32,
+    tags = { "surface", "ground" },
+
+    tiles = {
+        grass = {
+            grass1 = {
+                quad = { x = 0, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass2 = {
+                quad = { x = 32, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass3 = {
+                quad = { x = 64, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass4 = {
+                quad = { x = 96, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass5 = {
+                quad = { x = 0, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass6 = {
+                quad = { x = 32, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass7 = {
+                quad = { x = 64, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass8 = {
+                quad = { x = 96, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass9 = {
+                quad = { x = 0, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass10 = {
+                quad = { x = 32, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass11 = {
+                quad = { x = 64, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass12 = {
+                quad = { x = 96, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass13 = {
+                quad = { x = 0, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass14 = {
+                quad = { x = 32, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass15 = {
+                quad = { x = 64, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+            grass16 = {
+                quad = { x = 96, y = 0, w = 32, h = 32 },
+                category = "ground",
+                sockets = { N = "grass|flower_grass", E = "grass|flower_grass", S = "grass|flower_grass", W = "grass|flower_grass" }, -- «разъёмы» для состыковки
+                weight = 3,                                                                                                   -- шанс выбора среди аналогов
+                flags = { walkable = true },
+            },
+        }
+    }
+}
diff --git a/dev_utils/serpent.lua b/dev_utils/serpent.lua
new file mode 100644
index 0000000..ea4944f
--- /dev/null
+++ b/dev_utils/serpent.lua
@@ -0,0 +1,191 @@
+local n, v = "serpent", "0.303" -- (C) 2012-18 Paul Kulchenko; MIT License
+local c, d = "Paul Kulchenko", "Lua serializer and pretty printer"
+local snum = {
+    [tostring(1 / 0)] = '1/0 --[[math.huge]]',
+    [tostring(-1 / 0)] = '-1/0 --[[-math.huge]]',
+    [tostring(0 / 0)] =
+    '0/0'
+}
+local badtype = { thread = true, userdata = true, cdata = true }
+local getmetatable = debug and debug.getmetatable or getmetatable
+local pairs = function(t) return next, t end -- avoid using __pairs in Lua 5.2+
+local keyword, globals, G = {}, {}, (_G or _ENV)
+for _, k in ipairs({ 'and', 'break', 'do', 'else', 'elseif', 'end', 'false',
+    'for', 'function', 'goto', 'if', 'in', 'local', 'nil', 'not', 'or', 'repeat',
+    'return', 'then', 'true', 'until', 'while' }) do keyword[k] = true end
+for k, v in pairs(G) do globals[v] = k end -- build func to name mapping
+for _, g in ipairs({ 'coroutine', 'debug', 'io', 'math', 'string', 'table', 'os' }) do
+    for k, v in pairs(type(G[g]) == 'table' and G[g] or {}) do globals[v] = g .. '.' .. k end
+end
+
+local function s(t, opts)
+    local name, indent, fatal, maxnum = opts.name, opts.indent, opts.fatal, opts.maxnum
+    local sparse, custom, huge = opts.sparse, opts.custom, not opts.nohuge
+    local space, maxl = (opts.compact and '' or ' '), (opts.maxlevel or math.huge)
+    local maxlen, metatostring = tonumber(opts.maxlength), opts.metatostring
+    local iname, comm = '_' .. (name or ''), opts.comment and (tonumber(opts.comment) or math.huge)
+    local numformat = opts.numformat or "%.17g"
+    local seen, sref, syms, symn = {}, { 'local ' .. iname .. '={}' }, {}, 0
+    local function gensym(val)
+        return '_' .. (tostring(tostring(val)):gsub("[^%w]", ""):gsub("(%d%w+)",
+            -- tostring(val) is needed because __tostring may return a non-string value
+            function(s)
+                if not syms[s] then
+                    symn = symn + 1; syms[s] = symn
+                end
+                return tostring(syms[s])
+            end))
+    end
+    local function safestr(s)
+        return type(s) == "number" and (huge and snum[tostring(s)] or numformat:format(s))
+            or type(s) ~= "string" and tostring(s) -- escape NEWLINE/010 and EOF/026
+            or ("%q"):format(s):gsub("\010", "n"):gsub("\026", "\\026")
+    end
+    -- handle radix changes in some locales
+    if opts.fixradix and (".1f"):format(1.2) ~= "1.2" then
+        local origsafestr = safestr
+        safestr = function(s)
+            return type(s) == "number"
+                and (nohuge and snum[tostring(s)] or numformat:format(s):gsub(",", ".")) or origsafestr(s)
+        end
+    end
+    local function comment(s, l)
+        return comm and (l or 0) < comm and ' --[[' .. select(2, pcall(tostring, s)) .. ']]' or
+            ''
+    end
+    local function globerr(s, l)
+        return globals[s] and globals[s] .. comment(s, l) or not fatal
+            and safestr(select(2, pcall(tostring, s))) or error("Can't serialize " .. tostring(s))
+    end
+    local function safename(path, name) -- generates foo.bar, foo[3], or foo['b a r']
+        local n = name == nil and '' or name
+        local plain = type(n) == "string" and n:match("^[%l%u_][%w_]*$") and not keyword[n]
+        local safe = plain and n or '[' .. safestr(n) .. ']'
+        return (path or '') .. (plain and path and '.' or '') .. safe, safe
+    end
+    local alphanumsort = type(opts.sortkeys) == 'function' and opts.sortkeys or
+        function(k, o, n) -- k=keys, o=originaltable, n=padding
+            local maxn, to = tonumber(n) or 12, { number = 'a', string = 'b' }
+            local function padnum(d) return ("%0" .. tostring(maxn) .. "d"):format(tonumber(d)) end
+            table.sort(k, function(a, b)
+                -- sort numeric keys first: k[key] is not nil for numerical keys
+                return (k[a] ~= nil and 0 or to[type(a)] or 'z') .. (tostring(a):gsub("%d+", padnum))
+                    < (k[b] ~= nil and 0 or to[type(b)] or 'z') .. (tostring(b):gsub("%d+", padnum))
+            end)
+        end
+    local function val2str(t, name, indent, insref, path, plainindex, level)
+        local ttype, level, mt = type(t), (level or 0), getmetatable(t)
+        local spath, sname = safename(path, name)
+        local tag = plainindex and
+            ((type(name) == "number") and '' or name .. space .. '=' .. space) or
+            (name ~= nil and sname .. space .. '=' .. space or '')
+        if seen[t] then -- already seen this element
+            sref[#sref + 1] = spath .. space .. '=' .. space .. seen[t]
+            return tag .. 'nil' .. comment('ref', level)
+        end
+        -- protect from those cases where __tostring may fail
+        if type(mt) == 'table' and metatostring ~= false then
+            local to, tr = pcall(function() return mt.__tostring(t) end)
+            local so, sr = pcall(function() return mt.__serialize(t) end)
+            if (to or so) then -- knows how to serialize itself
+                seen[t] = insref or spath
+                t = so and sr or tr
+                ttype = type(t)
+            end -- new value falls through to be serialized
+        end
+        if ttype == "table" then
+            if level >= maxl then return tag .. '{}' .. comment('maxlvl', level) end
+            seen[t] = insref or spath
+            if next(t) == nil then return tag .. '{}' .. comment(t, level) end -- table empty
+            if maxlen and maxlen < 0 then return tag .. '{}' .. comment('maxlen', level) end
+            local maxn, o, out = math.min(#t, maxnum or #t), {}, {}
+            for key = 1, maxn do o[key] = key end
+            if not maxnum or #o < maxnum then
+                local n = #o -- n = n + 1; o[n] is much faster than o[#o+1] on large tables
+                for key in pairs(t) do
+                    if o[key] ~= key then
+                        n = n + 1; o[n] = key
+                    end
+                end
+            end
+            if maxnum and #o > maxnum then o[maxnum + 1] = nil end
+            if opts.sortkeys and #o > maxn then alphanumsort(o, t, opts.sortkeys) end
+            local sparse = sparse and #o > maxn -- disable sparsness if only numeric keys (shorter output)
+            for n, key in ipairs(o) do
+                local value, ktype, plainindex = t[key], type(key), n <= maxn and not sparse
+                if opts.valignore and opts.valignore[value] -- skip ignored values; do nothing
+                    or opts.keyallow and not opts.keyallow[key]
+                    or opts.keyignore and opts.keyignore[key]
+                    or opts.valtypeignore and opts.valtypeignore[type(value)] -- skipping ignored value types
+                    or sparse and value == nil then                           -- skipping nils; do nothing
+                elseif ktype == 'table' or ktype == 'function' or badtype[ktype] then
+                    if not seen[key] and not globals[key] then
+                        sref[#sref + 1] = 'placeholder'
+                        local sname = safename(iname, gensym(key)) -- iname is table for local variables
+                        sref[#sref] = val2str(key, sname, indent, sname, iname, true)
+                    end
+                    sref[#sref + 1] = 'placeholder'
+                    local path = seen[t] .. '[' .. tostring(seen[key] or globals[key] or gensym(key)) .. ']'
+                    sref[#sref] = path .. space .. '=' .. space ..
+                        tostring(seen[value] or val2str(value, nil, indent, path))
+                else
+                    out[#out + 1] = val2str(value, key, indent, nil, seen[t], plainindex, level + 1)
+                    if maxlen then
+                        maxlen = maxlen - #out[#out]
+                        if maxlen < 0 then break end
+                    end
+                end
+            end
+            local prefix = string.rep(indent or '', level)
+            local head = indent and '{\n' .. prefix .. indent or '{'
+            local body = table.concat(out, ',' .. (indent and '\n' .. prefix .. indent or space))
+            local tail = indent and "\n" .. prefix .. '}' or '}'
+            return (custom and custom(tag, head, body, tail, level) or tag .. head .. body .. tail) .. comment(t, level)
+        elseif badtype[ttype] then
+            seen[t] = insref or spath
+            return tag .. globerr(t, level)
+        elseif ttype == 'function' then
+            seen[t] = insref or spath
+            if opts.nocode then return tag .. "function() --[[..skipped..]] end" .. comment(t, level) end
+            local ok, res = pcall(string.dump, t)
+            local func = ok and "((loadstring or load)(" .. safestr(res) .. ",'@serialized'))" .. comment(t, level)
+            return tag .. (func or globerr(t, level))
+        else
+            return tag .. safestr(t)
+        end -- handle all other types
+    end
+    local sepr = indent and "\n" or ";" .. space
+    local body = val2str(t, name, indent) -- this call also populates sref
+    local tail = #sref > 1 and table.concat(sref, sepr) .. sepr or ''
+    local warn = opts.comment and #sref > 1 and space .. "--[[incomplete output with shared/self-references skipped]]" or
+        ''
+    return not name and body .. warn or "do local " .. body .. sepr .. tail .. "return " .. name .. sepr .. "end"
+end
+
+local function deserialize(data, opts)
+    local env = (opts and opts.safe == false) and G
+        or setmetatable({}, {
+            __index = function(t, k) return t end,
+            __call = function(t, ...) error("cannot call functions") end
+        })
+    local f, res = (loadstring or load)('return ' .. data, nil, nil, env)
+    if not f then f, res = (loadstring or load)(data, nil, nil, env) end
+    if not f then return f, res end
+    if setfenv then setfenv(f, env) end
+    return pcall(f)
+end
+
+local function merge(a, b)
+    if b then for k, v in pairs(b) do a[k] = v end end; return a;
+end
+return {
+    _NAME = n,
+    _COPYRIGHT = c,
+    _DESCRIPTION = d,
+    _VERSION = v,
+    serialize = s,
+    load = deserialize,
+    dump = function(a, opts) return s(a, merge({ name = '_', compact = true, sparse = true }, opts)) end,
+    line = function(a, opts) return s(a, merge({ sortkeys = true, comment = true }, opts)) end,
+    block = function(a, opts) return s(a, merge({ indent = '  ', sortkeys = true, comment = true }, opts)) end
+}
diff --git a/dev_utils/tile_generator.lua b/dev_utils/tile_generator.lua
new file mode 100644
index 0000000..076e98c
--- /dev/null
+++ b/dev_utils/tile_generator.lua
@@ -0,0 +1,21 @@
+--- @type {[string]: any}
+local out = {
+    tileSize = arg[1]
+}
+
+local idx = ""
+local cnt = 1
+
+for i = 0, #arg - 1, 4 do
+    idx = arg[i + 2]
+    out[idx] = {}
+    for x = tonumber(arg[i + 3]), tonumber(arg[i + 5]), tonumber(out.tileSize) do
+        for y = arg[i + 4], arg[i + 6], out.tileSize do
+            out[idx][idx .. cnt] = { x = x, y = y, w = out.tileSize, h = out.tileSize }
+        end
+    end
+end
+
+print(out)
+
+-- command for test: luajit dev_utils/tile_generator.lua 32 grass 0 0 95 95 flower_grass 96 0 189 95