I have been playing this game for 3 days. In order to gain funds and access speed up rewards, you have to watch ads. There are a lot of ads. Game play is slow as you need sufficient funds in order to upgrade every aspect of your theme park. You do this by watching another ad. I like the graphics and seeing the rides move. The game drains battery life on my device as I am constantly waiting for long ads to finish. However you can combat this by purchasing packs that give you ad free play.