The game is a fine time waster, but there are levels that simply are not possible without spending the premium currency. There was a timed mission to get 20 likes, I kept getting 19 so I used the instant cook and the auto serve. Even with no customers being at the counter for more than half a second the 20th customer was still walking when the time ran out so it was simply impossible. I've run into this multiple times but this is the first where I can't beat it after a few attempts.