I have a great idea for a game. It's called "let's leave the "watch an ad" buttons alone but hide the regular progression buttons for everything until a few seconds when they magically appear. This way, the user will get tricked into thinking an ad is the only way to proceed. Additionally, let's make some buttons make you watch an ad without even informing the user, oh and there's no way to back out of the ad without closing and reopening the app, oh and also have ads in between gameplay too"