\documentclass{beamer}
\usepackage[fontsize=20pt]{fontsize}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{svg}
\usepackage[T1]{fontenc}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc}
\graphicspath{ {./images/} }
\usetheme{Warsaw}

%Information to be included in the title page:

% Custom title page layout adjustments
\title{\large Porównanie wydajności i możliwości współczesnych silników do gier komputerowych}
\author{Krzysztof Rudnicki}
\institute{
    \textbf{Promotor} \\
    dr inż. Michał Chwesiuk
}
\date{\scriptsize \today} % Adjust the font size here


\setbeamertemplate{footline}[frame number]{}
\beamertemplatenavigationsymbolsempty
\setbeamertemplate{headline}{}






\begin{document}

\begin{frame}
  \vspace{-0.5cm} % Adjust vertical space above title
  \maketitle
  % Alternatively, use a completely custom layout:
  %\begin{center}
  %    {\Large\inserttitle\par}
  %    \vskip1em
  %    {\insertauthor\par}
  %    \vskip1em
  %    {\insertinstitute\par}
  %    \vskip1em
  %    {\insertdate\par}
  %\end{center}
\end{frame}

\begin{frame}
\frametitle{Plan prezentacji}
\tableofcontents
\end{frame}

	\input{sections/01-teoria}
	\input{sections/02-narzedzia}
	\input{sections/03-zrodla}
\end{document}