If you are using Windows, you can press [Ctrl][-] in Chrome to zoom out which will display more items in the list.
Press [Ctrl][+] to zoom back in after picking.
But you may want to consider using GetBackgroundColor or GetBackgroundPixelColor instead of using all of those sprites.
Your ball could use one of those blocks to test the color of a spot on it's leading edge to determine if it has collided with a wall.
---