Added boosts system which change the snake speed

game.c

@@ -7,7 +7,7 @@
 #include "grid.h"
 #include "snake.h"
 
-#define DIFFICULTY 6
+#define BASE_SPEED 6
 
 void print_help()
 {
@@ -35,6 +35,12 @@ int main(int argc, char *argv[])
 	int current_level = 1;
 	int global_score = 0;
 	int previous_score = 0;
+	int speed = BASE_SPEED;
+	int boosts = 0;
+	int boost_spawn_timer = 0;
+	int boost_spawn_interval = 0;
+	int boost_duration = 0;
+	const int boost_duration_frames = 5 * 24;
 
 	Grid *g;
 
@@ -152,9 +158,27 @@ int main(int argc, char *argv[])
 			char stats[256];
 			MLV_clear_window(MLV_COLOR_BLACK);
 
-			loop_count = (loop_count + 1) % DIFFICULTY;
+			loop_count = (loop_count + 1) % speed;
 			if (loop_count == 0)
 			{
+				if (boost_spawn_timer >= boost_spawn_interval)
+				{
+					int x, y;
+					do
+					{
+						x = rand() % g->nbc;
+						y = rand() % g->nbl;
+					} while (g->grid[y][x] != EMPTY);
+
+					g->grid[y][x] = BOOST;
+					boost_spawn_timer = 0;
+					boost_spawn_interval = 50 + rand() % BASE_SPEED;
+				}
+				else
+				{
+					boost_spawn_timer++;
+				}
+
 				result = move_snake(snake, g);
 
 				if (result == WALL || result == SNAKE)
@@ -173,6 +197,14 @@ int main(int argc, char *argv[])
 					global_score = previous_score;
 					break;
 				}
+				else if (result == BOOST)
+				{
+					boosts++;
+					boost_duration = boost_duration_frames;
+					speed = BASE_SPEED - boosts;
+					speed = (BASE_SPEED - boosts) > 1 ? (BASE_SPEED - boosts) : 1;
+					printf("Boost collected! Speed increased. Boost duration: %d frames\n", boost_duration);
+				}
 				else if (result == FRUIT)
 				{
 					Position *tail = snake->segments_list;
@@ -203,11 +235,22 @@ int main(int argc, char *argv[])
 				}
 			}
 
+			if (boost_duration > 0)
+			{
+				boost_duration--;
+				if (boost_duration == 0)
+				{
+					boosts--;
+					speed = (BASE_SPEED - boosts) > 1 ? (BASE_SPEED - boosts) : 1;
+					printf("Boost expired. Speed reset. Active boosts: %d\n", boosts);
+				}
+			}
+
 			draw_grid(g);
 
 			snprintf(stats, sizeof(stats),
-					 "Level: %d | Fruits Left: %d/%d | Score: %d | Snake Size: %d",
+					 "Level: %d | Fruits Left: %d/%d | Score: %d | Snake Size: %d | Boosts: %d",
-					 current_level, nb_fruit, total_fruits, global_score, snake->size);
+					 current_level, nb_fruit, total_fruits, global_score, snake->size, boosts);
 			MLV_draw_text(10, height - 20, stats, MLV_COLOR_WHITE);
 
 			MLV_actualise_window();

grid.c

@@ -69,11 +69,12 @@ void draw_grid(Grid *g)
     int window_width = MLV_get_window_width();
     int window_height = MLV_get_window_height();
     int cell_size = compute_size(g, window_width, window_height);
-    MLV_Image *image_wall, *image_fruit, *image_snake, *image_empty;
+    MLV_Image *image_wall, *image_fruit, *image_snake, *image_snake_head, *image_boost, *image_empty;
     image_wall = MLV_load_image("./assets/wall.png");
     image_fruit = MLV_load_image("./assets/fruit.png");
     image_snake = MLV_load_image("./assets/snake.png");
     image_snake_head = MLV_load_image("./assets/snake_head.png");
+    image_boost = MLV_load_image("./assets/boost.png");
     image_empty = MLV_load_image("./assets/grass.png");
     if (image_wall != NULL)
     {
@@ -91,6 +92,10 @@ void draw_grid(Grid *g)
     {
         MLV_resize_image_with_proportions(image_snake_head, cell_size, cell_size);
     }
+    if (image_boost != NULL)
+    {
+        MLV_resize_image_with_proportions(image_boost, cell_size, cell_size);
+    }
     if (image_empty != NULL)
     {
         MLV_resize_image_with_proportions(image_empty, cell_size, cell_size);
@@ -158,6 +163,16 @@ void draw_grid(Grid *g)
                     MLV_draw_image(image_snake_head, x, y);
                 }
                 break;
+            case BOOST:
+                if (image_boost == NULL)
+                {
+                    MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_YELLOW);
+                }
+                else
+                {
+                    MLV_draw_image(image_boost, x, y);
+                }
+                break;
             default:
                 MLV_draw_filled_rectangle(x, y, cell_size, cell_size, MLV_COLOR_BLACK);
                 break;

grid.h

@@ -21,7 +21,7 @@ typedef enum
     FRUIT = 'f',
     SNAKE = 's',
     SNAKEHEAD = 'S',
-    SNAKETAIL = 't'
+    BOOST = 'b'
 } Element;
 
 Grid *allocate_grid(int n, int m);