I've never seen so many ads and pop ups in any app before. It's horrible! You will hit more "X's" to close out the bombardment of ads than you will have of actual game pay.
I can understand a need to subliminally advertise but Good Lord! After every shot a pop up to upgrade, there's a constant banner taking up the bottom of the screen, then at random the game will disappear and a full page ad will appear.
I'm sure the game could be fun but after only 5 minutes I couldn't stand it anymore.
Oh! There's one last button I need to hit for this game: "DELETE"