Detail enamored addictive game

I myself have never really believed that it is possible to obtain for mobile phones such an ingenious construction game that extent requires absolutely no additional cost. The 79 cents it was worth to hide me advertising completely and since then the game runs quite frequently on my S2. Only that it's been frozen 2 times and I had to restart the game, spoils the fun a bit (so far, however, exceptional!). Otherwise, starts and ends the game very fixed, so a clear recommendation on my part: 4.5 / 5 stars.