Last Sunday, I dedicated a post to negative events in gameplay, and I stated that no negative events occur. Actually, failing to harvest the crops in due time results in letting it wither and, consequently, wasting the money spent to buy the seeds. Traditional gameplay (e.g. in management games such as SimCity or Civilization) usually provides automatic collection of benefits – the effort is in correct planning and committing to the investment, not in timely collection. But in this case, due to the specific nature of the game, the need to collect the produce before it’s wasted provides an obvious incentive to come back regularly and login to the game.