I enjoyed playing this game until the developers became so greedy. To have to watch 4 30-second (or longer) ads to get 1 extra tube is ridiculous. There are too many similar games available to waste so much time watching ads - more time than actually playing the game! I highly recommend that you look elsewhere for a similar game. BTW, I was at level 3367 so you know I played it a lot! No longer ... UNINSTALLING!!