Fix mistakes in movement code

Additional zero, plus inverted y

src/main.rs

@@ -1207,7 +1207,7 @@ fn main() {
                 // the center of the window and hidden)
                 if mouse.relative_mouse_mode() => {
                     camera.rotation.y -= xrel as f32 * ROT_MOUSE_SCALE;
-                    camera.rotation.x += yrel as f32 * ROT_MOUSE_SCALE;
+                    camera.rotation.x -= yrel as f32 * ROT_MOUSE_SCALE;
                     mouse.warp_mouse_in_window(&window, width as i32 / 2, height as i32 / 2);
                 }
                 _ => {}
@@ -1259,7 +1259,7 @@ fn main() {
         queue_present(&swapchain_loader, &queue, &swapchain, img_inx, &sem_finish);
 
         let elapsed = now.elapsed();
-        let delay = (1000_0000u128 / 240).saturating_sub(elapsed.as_micros());
+        let delay = (1_000_000u128 / 60).saturating_sub(elapsed.as_micros());
         thread::sleep(Duration::from_micros(delay as u64));
     }
 }