This app is a bait and switch. You play the app for about an hour and start enjoying the game. After the first island, an NPC tells you that you have to fork over 7$ or watch 15 or so ads in a row to progress to the next island. This is what I would call a bait and switch. There should have been warnings about this from the beginning. Additionally if you don't pay, every time you clear a dungeon you get to see an ad. No thank you.