Good game to play!
At first, this game sounds like it is going to be an easy one, but actually it's really not. It starts off easy, but it gets hard the more farther you get. The first two are pretty easy, but the other ones are hard, and it might take you awhile to complete the game, even if you are going for no mistakes. There are also puns in this game, and some are kind of funny.
One thing I suggest is adding music to the game. After playing it for awhile, it kind of gets tedious with no music playing. They should also add some sound effect to play when you spot a difference.
Other than that, it a good game to play!