|  | @@ -2,6 +2,7 @@ const navigation = {
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				|  |  |    list: [],
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				|  |  |    prevState: undefined,
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				|  |  |    audioIcon: undefined,
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				|  |  | +  showAnswerIcon: undefined,
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				|  |  |    labelLeft: undefined,
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				|  |  |    labelRight: undefined,
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				|  |  |  
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				|  | @@ -30,6 +31,7 @@ const navigation = {
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				|  |  |            return;
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				|  |  |          }
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				|  |  |          const asset = game.add.image(x, 10, icon, 1.5);
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				|  |  | +        navigation.showAnswerIcon = asset;
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				|  |  |          navigation.list.push(asset);
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				|  |  |          x += iconSize;
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				|  |  |        });
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				|  | @@ -48,9 +50,7 @@ const navigation = {
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				|  |  |            navigation.audioIcon = asset;
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				|  |  |          }
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				|  |  |  
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				|  |  | -        if (icon === 'lang') {
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				|  |  | -          asset = game.add.image(x, 10, 'lang', 1.5);
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				|  |  | -        }
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				|  |  | +        if (icon === 'lang') asset = game.add.image(x, 10, 'lang', 1.5);
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				|  |  |  
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				|  |  |          navigation.list.push(asset);
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				|  |  |          x -= iconSize;
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				|  | @@ -65,9 +65,14 @@ const navigation = {
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				|  |  |      game.state.start(state);
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				|  |  |    },
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				|  |  |  
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				|  |  | +  disableIcon: (icon) => {
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				|  |  | +    icon.alpha = 0.4;
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				|  |  | +    icon.isDisabled = true;
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				|  |  | +  },
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				|  |  | +
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				|  |  |    onInputDown: (x, y) => {
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				|  |  |      navigation.list.forEach((icon) => {
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				|  |  | -      if (game.math.isOverIcon(x, y, icon)) {
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				|  |  | +      if (game.math.isOverIcon(x, y, icon) && !icon.isDisabled) {
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				|  |  |          const iconName = icon.name;
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				|  |  |          switch (iconName) {
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				|  |  |            case 'menu':
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				|  | @@ -81,8 +86,11 @@ const navigation = {
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				|  |  |              navigation.changeState(state);
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				|  |  |              break;
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				|  |  |            case 'show_answer':
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				|  |  | -            if (audioStatus) game.audio.popSound.play();
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				|  |  | -            self.utils.showAnswer();
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				|  |  | +            if (navigation.showAnswerIcon.alpha === 1) {
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				|  |  | +              if (audioStatus) game.audio.popSound.play();
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				|  |  | +              self.utils.showAnswer();
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				|  |  | +              navigation.disableIcon(navigation.showAnswerIcon);
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				|  |  | +            }
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				|  |  |              break;
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				|  |  |            case 'audio':
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				|  |  |              if (audioStatus) {
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				|  | @@ -105,7 +113,7 @@ const navigation = {
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				|  |  |    onInputOver: (x, y) => {
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				|  |  |      let isOverIcon = false;
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				|  |  |      navigation.list.forEach((icon) => {
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				|  |  | -      if (game.math.isOverIcon(x, y, icon)) {
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				|  |  | +      if (game.math.isOverIcon(x, y, icon) && !icon.isDisabled) {
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				|  |  |          isOverIcon = true;
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				|  |  |          const iconName = icon.name;
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				|  |  |          switch (iconName) {
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