I bought it for 4 dollars because I thought it was the full version of the game. If it is how do I get to the next level so it will let me have a 4th kin? If it isn't I want a refund and I wanna know where to get the full version. (My bad for buying it without checking)

The 4th Kin isn't released yet. Since you've purchased the game once the next Kin becomes available you will be able to update the game to play the new content. We're working on the next set of Kin now.