Please use code tags, when posting on the forums 
You can read about how to use them here: Using code tags properly
I would recommend that you not set your score text in the update method, but rather when you increase your score (just update it then).
Also, you can drag n drop your scoreText from the inspector to this script and remove the GameObject.Find which is a good habit to avoid using (that).
Last, but certainly not least … where is your code for the score? Without that, it’s hard to really help you with your code!