diff --git a/src/Snake.c b/src/Snake.c
index 19ce57f..0570792 100644
--- a/src/Snake.c
+++ b/src/Snake.c
@@ -108,13 +108,12 @@ void snake_move(Snake* snake, const int width, const int height) {
   check_bounds(snake, width, height);
 }
 
-void snake_print_info(Snake* snake) {
+void snake_print_info(const Snake* snake) {
   printf("snake: {\n");
   printf("  parts: {\n");
   for (size_t i = 0; i < snake->length; i++) {
-    BoardPiece part = snake->parts[i];
-    printf("    x: %d\n", part.x);
-    printf("    y: %d\n", part.y);
+    const BoardPiece part = snake->parts[i];
+    printf("    { x: %d, y: %d }\n", part.x, part.y);
   }
   printf("  }\n");
 
diff --git a/src/headers/Snake.h b/src/headers/Snake.h
index 1e076ae..53f94ec 100644
--- a/src/headers/Snake.h
+++ b/src/headers/Snake.h
@@ -20,7 +20,7 @@ Snake snake_alloc(
     );
 void snake_free(Snake* snake);
 void snake_move(Snake* snake, const int width, const int height);
-void snake_print_info(Snake* snake);
+void snake_print_info(const Snake* snake);
 void snake_change_direction(Snake* snake, const char direction);
 bool snake_collides(const Snake* snake, const BoardPiece* piece);
 bool snake_collides_with_tail(const Snake* snake);
diff --git a/src/main.c b/src/main.c
index 8931209..167dc72 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,118 +1,128 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <termios.h>
-#include <stdlib.h>
 #include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
 #include <time.h>
+#include <unistd.h>
 
 #include "Board.h"
-#include "Snake.h"
-#include "utils.h"
-#include "food.h"
 #include "BoardPiece.h"
+#include "Snake.h"
 #include "args.h"
+#include "food.h"
+#include "utils.h"
 
 #define TERMIOS 1
 #define DEBUG 0
 
+#define MIN_SLEEP_TIME_MS 60
+
 const char snake_vis = '#';
 
 struct termios set_termios();
 
 int main(int argc, char** argv) {
-  Arguments args = cmd_args(argc, argv);
+    Arguments args = cmd_args(argc, argv);
 
-  srand(time(NULL));
+    srand(time(NULL));
 
-  // Termios setup
+    // Termios setup
 #if TERMIOS
-  const struct termios attr_orig = set_termios();
+    const struct termios attr_orig = set_termios();
 #endif // TERMIOS
 
-  // Game model init
-  const int board_w = args.width;
-  const int board_h = args.height;
-  Board board = board_alloc(board_w, board_h);
-  Snake snake = snake_alloc(board_w * board_h, 0, 0, 'd');
-  BoardPiece food = { .vis_char = '$' };
-  food_new_location(&board, &food, &snake);
-  unsigned int score = 0;
+    // Game model init
+    const int board_w = args.width;
+    const int board_h = args.height;
+    Board board = board_alloc(board_w, board_h);
+    Snake snake = snake_alloc(board_w * board_h, 0, 0, 'd');
+    BoardPiece food = { .vis_char = '$' };
+    food_new_location(&board, &food, &snake);
+    unsigned int score = 0;
+    unsigned int sleep_time = args.sleep_ms;
 
-  // Screen init
-  system("clear");
-
-#if DEBUG
-  long long frame = 0;
-#endif // DEBUG
-
-  while (true) {
+    // Screen init
     system("clear");
 
-    // Process input
-    char input = '0';
-    read(STDIN_FILENO, &input, 1);
-
-    if (isalpha(input)) {
-      if (
-          (input == 'w' && snake.dir != 's')
-          || (input == 'a' && snake.dir != 'd')
-          || (input == 's' && snake.dir != 'w')
-          || (input == 'd' && snake.dir != 'a')
-          ) {
-        snake_change_direction(&snake, input);
-      }
-    }
-
-    snake_move(&snake, board.width, board.height);   
-    board_clear(&board);
-    board_draw_snake(&board, &snake);
-    board_set_square(&board, food.x, food.y, food.vis_char);
-    print_board(&board);
-    printf("Score: %d\n", score);
-
-    BoardPiece snake_head = snake_get_part(&snake, 0);
-
-    if (snake_collides_with_tail(&snake)) {
-      printf("GAME OVER\n");
-      exit(EXIT_SUCCESS);
-    }
-
-    if (pieces_collide(&snake_head, &food)) {
-      score++;
-      snake_add_part(&snake);
-      food_new_location(&board, &food, &snake);
-    }
-
 #if DEBUG
-    printf("input: %c\n", input);
-    printf("Frame: %d\n", frame);
-    snake_print_info(&snake);
-    board_piece_print_info(&food, "Food");
-    frame++;
+    long long frame = 0;
 #endif // DEBUG
 
-    sleep_ms(args.sleep_ms);
-  }
+    while (true) {
+        system("clear");
+
+        // Process input
+        char input = '0';
+        read(STDIN_FILENO, &input, 1);
+
+        if (isalpha(input)) {
+            if (
+                (input == 'w' && snake.dir != 's')
+                || (input == 'a' && snake.dir != 'd')
+                || (input == 's' && snake.dir != 'w')
+                || (input == 'd' && snake.dir != 'a')) {
+                snake_change_direction(&snake, input);
+            }
+        }
+
+        snake_move(&snake, board.width, board.height);
+        board_clear(&board);
+        board_draw_snake(&board, &snake);
+        board_set_square(&board, food.x, food.y, food.vis_char);
+        print_board(&board);
+        printf("Score: %d\n", score);
+
+        BoardPiece snake_head = snake_get_part(&snake, 0);
+
+        if (snake_collides_with_tail(&snake)) {
+            printf("GAME OVER\n");
+            break;
+        }
+
+        if (pieces_collide(&snake_head, &food)) {
+            score++;
+            snake_add_part(&snake);
+            food_new_location(&board, &food, &snake);
+            const unsigned int new_sleep_time = sleep_time - 5;
+            if (new_sleep_time >= MIN_SLEEP_TIME_MS) {
+                sleep_time = new_sleep_time;
+            }
+        }
+
+#if DEBUG
+        printf("input: %c\n", input);
+        printf("Frame: %lld\n", frame);
+        printf("sleep_ms: %u\n", sleep_time);
+        snake_print_info(&snake);
+        board_piece_print_info(&food, "Food");
+        frame++;
+#endif // DEBUG
+
+        sleep_ms(sleep_time);
+    }
 
 #if TERMIOS
-  tcsetattr(STDIN_FILENO, 0, &attr_orig);
+    tcsetattr(STDIN_FILENO, 0, &attr_orig);
 #endif // TERMIOS
 
-  return 0;
+    board_free(&board);
+    snake_free(&snake);
+
+    return 0;
 }
 
 struct termios set_termios() {
-  struct termios attr;
+    struct termios attr;
 
-  tcgetattr(STDIN_FILENO, &attr);
+    tcgetattr(STDIN_FILENO, &attr);
 
-  const struct termios attr_orig = attr;
+    const struct termios attr_orig = attr;
 
-  attr.c_lflag &= ~(ECHO | ICANON);
-  attr.c_cc[VMIN] = 0;
-  attr.c_cc[VTIME] = 0;
+    attr.c_lflag &= ~(ECHO | ICANON);
+    attr.c_cc[VMIN] = 0;
+    attr.c_cc[VTIME] = 0;
 
-  tcsetattr(STDIN_FILENO, 0, &attr);
+    tcsetattr(STDIN_FILENO, 0, &attr);
 
-  return attr_orig;
+    return attr_orig;
 }