Why have to sign up and log in?????????

I used to use this to mess around, because I find these type of games fun. I liked being able to play this anytime I wanted to. Now an adult has to sign me up and that is aggravating. Since I am only eleven, it is so annoying! I am thinking about deleting this app. Why cant it be like before?

Build-a-lot 2 addict about Piano Dust Buster by JoyTunes