How do I next layout the smooth way

so my "hello world" game will have different levels, how do i move to the next layout with having to delete the previous one piece by peace?can i disable the whole layout when i go to the next one or does it do that by itself? also how do i make it to where if they been to a level it is unlocked and they can play again but levels they haven't are locked?

also when publishing to android, which wrapper can i use to build the app without internet connection