Friends Management: Within the game, deleting friends is not possible. For this you need a Windows application from EA / Origin. On their website you can see the available free of charge.
Security: The game occasionally crashes. Who has created no user + password at EA / Origin of the game, lose to this case everything. If necessary, which were previously paid with real money content. Therefore definitely create user / password and record both.
The game is great fun and is ideal to relax only once briefly. The sale of donuts worthwhile only if used for figures or buildings. The donuts are much too expensive for accelerating a construction progress. The Pemium content (costs "donuts"), are generally very expensive. Hopefully that will be even more favorable if the game is not so popular. Who currently wants to unlock all the content, must be about 200 euros to spend (!). But free content are also abundant.
Invite me :-): nebjun782