oops, forgot to clean up...

pong/pong.c

@@ -108,5 +108,7 @@ int main(void){
 
         EndDrawing();
     }
+
+    CloseWindow();
     return 0;
 }

sliding-puzzle/sliding.c

@@ -76,6 +76,7 @@ int main()
     }
 
     free(field);
+    CloseWindow();
 }
 
 int checkField(int* field, int row, int column)