No menu screen to be able to start over, explain the goal of the game, or what the various shapes of the nodes mean (if the is any meaning?) A Lot of ads, by the time you've saved up cash to do a node upgrade an ad pops up mid action which ends up taking you to the advertisements store location most times. Yes ads are necessary but this is too much too often I started getting annoyed and tossing the phone to the side if an ad popped up. Will probably uninstall soon before I try to "finish."