diff --git a/examples/function_memory_game/src/components/app.rs b/examples/function_memory_game/src/components/app.rs
index 7e68e18fd..226c3399f 100644
--- a/examples/function_memory_game/src/components/app.rs
+++ b/examples/function_memory_game/src/components/app.rs
@@ -16,38 +16,45 @@ pub fn App() -> Html {
     let state = use_reducer(State::reset);
     let sec_past = use_state(|| 0_u32);
     let sec_past_timer: Rc<RefCell<Option<Interval>>> = use_mut_ref(|| None);
-    let flip_back_timer: Rc<RefCell<Option<Timeout>>> = use_mut_ref(|| None);
+    let limit_flips_timer: Rc<RefCell<Option<Timeout>>> = use_mut_ref(|| None);
     let sec_past_time = *sec_past;
 
-    use_effect_with(state.clone(), move |state| {
-        // game reset
-        if state.status == Status::Ready {
-            sec_past.set(0);
+    use_effect_with(state.clone(), {
+        let limit_flips_timer = limit_flips_timer.clone();
+        move |state| {
+            // game reset
+            if state.status == Status::Ready {
+                sec_past.set(0);
+            }
+            // game start
+            else if *sec_past == 0 && state.last_card.is_some() {
+                let sec_past = sec_past.clone();
+                let mut sec = *sec_past;
+                *sec_past_timer.borrow_mut() = Some(Interval::new(1000, move || {
+                    sec += 1;
+                    sec_past.set(sec);
+                }));
+            }
+            // game over
+            else if state.status == Status::Passed {
+                *sec_past_timer.borrow_mut() = None;
+                *limit_flips_timer.borrow_mut() = None;
+                state.dispatch(Action::TrySaveBestScore(*sec_past));
+            }
+            // match failed
+            else if state.rollback_cards.is_some() {
+                let cloned_state = state.clone();
+                let cloned_rollback_cards = state.rollback_cards.clone().unwrap();
+                *limit_flips_timer.borrow_mut() = Some(Timeout::new(1000, {
+                    let limit_flips_timer = limit_flips_timer.clone();
+                    move || {
+                        limit_flips_timer.borrow_mut().take();
+                        cloned_state.dispatch(Action::RollbackCards(cloned_rollback_cards));
+                    }
+                }));
+            }
+            || ()
         }
-        // game start
-        else if *sec_past == 0 && state.last_card.is_some() {
-            let sec_past = sec_past.clone();
-            let mut sec = *sec_past;
-            *sec_past_timer.borrow_mut() = Some(Interval::new(1000, move || {
-                sec += 1;
-                sec_past.set(sec);
-            }));
-        }
-        // game over
-        else if state.status == Status::Passed {
-            *sec_past_timer.borrow_mut() = None;
-            *flip_back_timer.borrow_mut() = None;
-            state.dispatch(Action::TrySaveBestScore(*sec_past));
-        }
-        // match failed
-        else if state.rollback_cards.is_some() {
-            let cloned_state = state.clone();
-            let cloned_rollback_cards = state.rollback_cards.clone().unwrap();
-            *flip_back_timer.borrow_mut() = Some(Timeout::new(1000, move || {
-                cloned_state.dispatch(Action::RollbackCards(cloned_rollback_cards));
-            }));
-        }
-        || ()
     });
 
     let on_reset = {
@@ -58,6 +65,17 @@ pub fn App() -> Html {
     let on_flip = {
         let state = state.clone();
         Callback::from(move |card| {
+            if limit_flips_timer.borrow().is_some() {
+                return;
+            }
+
+            *limit_flips_timer.borrow_mut() = Some(Timeout::new(1000, {
+                let limit_flips_timer = limit_flips_timer.clone();
+                move || {
+                    limit_flips_timer.borrow_mut().take();
+                }
+            }));
+
             state.dispatch(Action::FlipCard(card));
         })
     };