In the rules it says that to consider a level completed it only requires 1 star. I guess this also counts for the old accounts category. So, if only 1 star is required, could I simply complete the 1st screen of a level, get the star, and then leave the level (using the button on the top right)? I tried doing this on a new account, and it does give you the star when leaving. I was just wondering if I could do this on an old account as well.