diff --git a/README.md b/README.md
new file mode 100644
index 0000000..be732fa
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+# Tic-Tac-Toe
+
+A simple terminal-based Tic-Tac-Toe game.
+
+## Build
+
+To build the game, run the following commands:
+
+```bash
+cmake -S . -B build && cmake --build build
+```
+
+## Run
+
+To run the game, execute the following command from the `build` directory:
+
+```bash
+./build/tic_tac_toe
+```
+
+## How to Play
+
+- Use the numbers 1-9 on your keyboard to select a cell on the board.
+- The numbers correspond to the cells as follows:
+
+```
+1 | 2 | 3
+--+---+--
+4 | 5 | 6
+--+---+--
+7 | 8 | 9
+```
+
+- Press 'q' to quit the game at any time.
+
+## About
+
+- This is a simple implementation of the classic Tic-Tac-Toe game.
+- It is written in C++23.
+- It uses the `ncurses` library to render the game in the terminal.
diff --git a/include/engine.hpp b/include/engine.hpp
index 3ad027a..7897d86 100644
--- a/include/engine.hpp
+++ b/include/engine.hpp
@@ -3,12 +3,13 @@
 
 #include <memory>
 #include <array>
-#include <globals.hpp>
+
+constexpr int ROW = 5;
+constexpr int COL = 5;
 
 struct Window {
 	Window();
 	std::array<std::array<char, COL>, ROW> view;
-	void clear_display();
 	void draw_display();
 };
 
@@ -40,7 +41,6 @@ private:
 		Player *temp;
 		GameState() : player1('x'), player2('o'), temp { &player1 } {};
 	} state;
-	void set_player();
 	bool process_input();
 	bool exit_code();
 	bool check_line(char id);
diff --git a/include/globals.hpp b/include/globals.hpp
deleted file mode 100644
index 8331941..0000000
--- a/include/globals.hpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef GLOBALS_HPP
-#define GLOBALS_HPP
-
-constexpr int ROW = 5;
-constexpr int COL = 5;
-
-#endif
diff --git a/src/engine.cpp b/src/engine.cpp
index 8bdb713..1e15bdc 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -88,18 +88,14 @@ bool Engine::process_input() {
 			index = ch - '1';
 			if(win->view[map[index].y][map[index].x] == ' ') {
 				win->view[map[index].y][map[index].x] = state.temp->id;
-				set_player();
+				if(state.temp->id == 'x') { state.temp = &state.player2; }
+				else if(state.temp->id == 'o') { state.temp = &state.player1; }
 			}
 		}
 	}
 	return true;
 }
 
-void Engine::set_player() {
-	if(state.temp->id == 'x') { state.temp = &state.player2; }
-	else if(state.temp->id == 'o') { state.temp = &state.player1; }
-}
-
 bool Engine::check_line(char id) {
 	for(int i : std::ranges::views::iota(0, COL)) {
 		if(ROW % 2 != 0) continue;