diff --git a/kristify.lua b/kristify.lua
index e4c1b36..000888a 100644
--- a/kristify.lua
+++ b/kristify.lua
@@ -1,20 +1,200 @@
--- Kristify shop manager
+local installation = "kristify"
+local owner,repo = "kristify","themes"
+local tArgs = {...}
 
-local w, h = term.getSize()
-
-if not (#arg >= 1) then
-  print("Not enogth arguments")
-  return
+-- Check update
+local verPath = fs.combine(installation,"src","version.txt")
+local version = "0.0.0"
+if fs.exists(verPath) then
+  local file = fs.open(verPath, 'r')
+  version = file.readAll()
+  file.close()
 end
 
-if arg[1] == "theme" then
-  if #arg == 1 then
-    print("The current theme is: ")
-    return
+local authenticate = _G._GIT_API_KEY and {Authorization = "Bearer ".._G._GIT_API_KEY}
+local gitAPI = http.get("https://raw.githubusercontent.com/Kristify/Kristify/main/src/version.txt", authenticate)
+if gitAPI then
+    local newV = gitAPI.readAll()
+    if newV ~= version then
+      term.setTextColor(colors.orange)
+      term.write("Update available for Kristify! ")
+      term.setTextColor(colors.lightGray)
+      print(newV.."->"..version)
+      term.setTextColor(colors.white)
+      print("Run \'kristify.lua -u\' or --update")
+      sleep(0.8)
+    end
+    gitAPI.close()
+end
+
+-- Run Kristify normally
+if #tArgs == 0 then
+  local path = fs.combine(installation,"src","init.lua")
+  if not fs.exists(path) then
+    error("Kristify is not installed correctly!")
   end
 
-  print("Installing theme: " .. arg[2])
-  return
+  if term.isColor() then
+    local id = shell.openTab(path)
+    multishell.setTitle(id, "Kristify")
+    shell.switchTab(id)
+  else
+    shell.run(path)
+  end
 end
 
-print("Action `" .. arg[1] .. "` is not available.")
+-- Install theme
+if tArgs[1] == "--theme" or tArgs[1] == "-t" then
+  -- Show current theme
+  if not tArgs[2] or tArgs[2] == "" then
+    local name,author = "Unknown","Herobrine"
+    local path = fs.combine(installation,"data","credits.json")
+    if fs.exists(path) then
+      local file = fs.open(verPath, 'r')
+      local data = file.readAll()
+      data = textutils.unserialiseJSON(data) or {}
+      name = data.name or "Unknown"
+      author = data.author or "Herobrine"
+      file.close()
+    end
+
+    term.setTextColor(colors.lightGray)
+    term.write("Theme: ")
+    term.setTextColor(colors.white)
+    print(name.." by "..author)
+  else
+    -- Change theme
+    local file = http.get("https://raw.githubusercontent.com/"..owner..'/'..repo.."/main/"..tArgs[2].."/credits.json")
+    if not file then printError("The given theme doesn't exist!") return end
+
+    local data = file.readAll()
+    data = textutils.unserialiseJSON(data)
+    if not data then printError("The given theme doesn't exist!") return end
+    local name = data.name
+    local author = data.author
+    file.close()
+
+    print("Installing "..name.." by "..author)
+
+    local function httpError(response,err,errResponse)
+        if not response then
+          errors = true
+          justinWeHaveAProblem("Request to GitHub denied; Reason: \'.."..err.."..\' (code "..errResponse.getResponseCode()..").")
+          return false
+        end
+        return true
+    end
+
+    local function getJSON(response)
+      if not response then return {} end
+      local tData = response.readAll()
+      response.close()
+      return textutils.unserialiseJSON(tData)
+    end
+
+    local function generateTree(name)
+      sURL = "https://api.github.com/repos/"..owner..'/'..repo.."/contents/"..name.."?ref=main"
+      local function convertItem(item)
+          if item.type == "file" then
+              return item.name, item.download_url
+          elseif item.type == "dir" then
+              return item.name, generateTree(item.url)
+          end
+      end
+      local response,sErr,errResponse = http.get(sURL, authenticate)
+      httpError(response,sErr,errResponse)
+      local tData = getJSON(response)
+      local tTree = { }
+      for _,v in pairs(tData) do
+          local sName,tItem = convertItem(v)
+          -- Filter stuff that is not needed
+          if not (sName:sub(1,1) == '.' or sName:find(".md")) then
+              tTree[sName] = tItem
+          end
+      end
+      return tTree
+    end
+
+    local function downloadBlob(sURL, sPath)
+      local response,sErr,errResponse = http.get(sURL, authenticate)
+      if not httpError(response,sErr,errResponse) then
+        return false
+      end
+
+      local sData = response.readAll()
+      response.close()
+
+      local file = fs.open(sPath, 'w')
+      file.write(sData)
+      file.close()
+
+      return true
+    end
+
+    local theme = generateTree(name)
+    local function downloadItems(tree,sPath)
+      sleep(0.3)
+      for name,item in pairs(tree) do
+        local nextPath = fs.combine(sPath,name)
+        if type(item) == "table" then
+          downloadItems(item,nextPath)
+        else
+          downloadBlob(item,nextPath)
+        end
+      end
+    end
+
+    local path = fs.combine(installation,"data","pages")
+    fs.delete(path)
+    downloadItems(theme, path)
+  end
+
+elseif tArgs[1] == "--version" or tArgs[1] == "-v" then
+  print("Kristify v"..version)
+  term.write("GitHub: Kristify/Kristify made with ")
+  term.setTextColor(colors.red)
+  print("\003")
+  term.setTextColor(colors.white)
+
+elseif tArgs[1] == "--update" or tArgs[1] == "-u" then
+  local path = fs.combine(installation,"data")
+  if fs.exists(path) then
+    fs.copy(path, ".kristify_data_backup")
+  end
+
+  -- Run installer
+  if not http then
+    error("Holdup. How- eh whatever. You need the http API!")
+  end
+
+  local authenticate = _G._GIT_API_KEY and {Authorization = "Bearer ".._G._GIT_API_KEY}
+  local response,err,errResp = http.get("https://raw.githubusercontent.com/Kristify/kristify/main/installer.lua",authenticate)
+
+  if not response then
+      error("Couldn't get the install script! Reason: \'"..err.."\' (code "..errResp.getResponseCode()..')')
+  end
+
+  local content = response.readAll()
+  response.close()
+
+  local path = load(content, "install",'t',_ENV)()
+
+  if fs.exists(".kristify_data_backup") then
+    fs.delete(fs.combine(path,"data"))
+    fs.copy(".kristify_data_backup",fs.combine(path,"data"))
+  end
+
+elseif tArgs[1] == "--storage" or tArgs[1] == "-s" then
+  os.queueEvent("kstUpdateProducts")
+
+elseif tArgs[1] == "--exit" or tArgs[1] == "-e" then
+  os.queueEvent("kristify:exit")
+
+elseif tArgs[1] == "--help" or tArgs[1] == "-h" then
+  print("Usage: "..(tArgs[0] or "kristify.lua").." [flag:]")
+  print("-u","--update","Updates Kristify.")
+  print("-v","--version","Shoes the current version.")
+  print("-t [name]","--theme","Shows or installs a given theme.")
+  print("-s", "--storage", "Updates the storage.")
+  print("-e", "--exit", "Stops the shop")
+end