diff --git a/src/js/intl/index.js b/src/js/intl/index.js
index 8247429a..35bc2ad9 100644
--- a/src/js/intl/index.js
+++ b/src/js/intl/index.js
@@ -57,7 +57,7 @@ var str = exports.str = function(key, params) {
 
 var getIntlKey = exports.getIntlKey = function(obj, key, overrideLocale) {
   if (!obj || !obj[key]) {
-    throw new Error('that key ' + key + 'doesn\'t exist in this blob' + obj);
+    throw new Error('that key ' + key + ' doesn\'t exist in this blob ' + obj);
   }
   if (!obj[key][getDefaultLocale()]) {
     console.warn(
diff --git a/src/js/stores/LevelStore.js b/src/js/stores/LevelStore.js
index 6c184ddf..a39ef74c 100644
--- a/src/js/stores/LevelStore.js
+++ b/src/js/stores/LevelStore.js
@@ -143,7 +143,7 @@ AppConstants.StoreSubscribePrototype,
 
   getLevelsInSequence: function(sequenceName) {
     if (!levelSequences[sequenceName]) {
-      throw new Error('that sequecne name ' + sequenceName + 'does not exist');
+      throw new Error('that sequence name ' + sequenceName + ' does not exist');
     }
     return levelSequences[sequenceName];
   },
diff --git a/src/js/visuals/index.js b/src/js/visuals/index.js
index 3c535de9..45bdbeb7 100644
--- a/src/js/visuals/index.js
+++ b/src/js/visuals/index.js
@@ -219,7 +219,7 @@ GitVisuals.prototype.animateAllAttrKeys = function(keys, attr, speed, easing) {
 GitVisuals.prototype.finishAnimation = function(speed) {
   speed = speed || 1.0;
   if (!speed) {
-    throw new Error('need speed by time i finish animation' + speed);
+    throw new Error('need speed by time i finish animation ' + speed);
   }
 
   var _this = this;
@@ -309,7 +309,7 @@ GitVisuals.prototype.finishAnimation = function(speed) {
     animationDone.resolve();
   })
   .fail(function(reason) {
-    console.warn('animation error' + reason);
+    console.warn('animation error ' + reason);
   })
   .done();