\documentclass[a4paper]{scrartcl}
\usepackage{amssymb, amsmath} % needed for math
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\usepackage[english]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage[margin=2.5cm]{geometry} %layout
\usepackage{hyperref}   % links im text
\usepackage{parskip}
\usepackage{csquotes}

\title{The Game '2048'}
\author{Martin Thoma}

\hypersetup{
  pdfauthor   = {Martin Thoma},
  pdfkeywords = {Game, combinatorics, 2048},
  pdftitle    = {The Game '2048'}
}

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\begin{document}
\maketitle
\begin{abstract}
\enquote{2048} is a single-player game with random elements and a score.
\end{abstract}

\section{Rules of '2048'}
\enquote{2048} is played on a $4 \times 4$ grid.

\section{Best reachable highscore}

\section{Algorithms}

\section{Related}
\begin{itemize}
    \item \url{http://math.stackexchange.com/q/716469/6876}
\end{itemize}

\end{document}