I found in this game if on your first level you clear all, they x your score by 6. It also helps to start at the top and work down.

 

A good thing to do is chose a colour which you thinink has the most bricks on your page. Now when you click on the bricks DONT click on any ones of the colour you chose. If all goes to plan you should end up with tons of the bricks of the colour you chose at the beginning to click on and then you get TONS of points Allso start at the top and work your way down the page that way you dont miss any bricks.