Why is my colorscheme not looking like the screenshots?

[vzytoi]

Hey, I just installed this colorscheme, which looks really good but It don't looks the same when I installed it. Here is my config.

    use {
        'projekt0n/github-nvim-theme',
        config = function()
            require("github-theme").setup({
              themeStyle = "dark",
            })
        end
    }

vim.o.termguicolors = true
vim.o.background = 'dark'

[ful1e5]

check #16 for progress