Warning
You are more than welcome to delete your data at any time. We do not use it to make money or to share with third parties or analytics etc, etc. But if you do delete it you will lose all of your stats. None the end of the world, we agree, but it can be a bit of a disappointed !!
TL;DR
Also, if you are curious to see what data we hold, we have created a page that displays all of the data regarding your use of the game. Its pretty boring, but as you can see there is nothing personal in there, other than your amazing scores ;)