Good exhaust halls. Use your intelligences. The first rooms are quite easy to draw in (it worked). It gets harder as you go. The ad can appear when you advance between rooms, but if you observe it, you won a free suggestion (sometimes). The puzzles can be challenging, persevere in. (Useful tip: Keep feather and paper by hand, so ... Incredible. There are some ads, but I do not care that BC need money, right? It is a free game, so you have to get money in some way :) Get this application, it will not regret it. Have fun! Very challenging and gives you an incredible brain training. I would make you feel proud of yourself when you spend a room. Really good and I definitely recommend it !! Is a kind of easy the only part that is difficult and, therefore, the game can be fun and very bad, but for me, it is not like that, the boys should try this game and see how they like them and everything that like and wait for you to like you have a good day or night if your city is night and everything, except ... The game is very entertaining, the only side of this game is that there are ads after each level of the exhaust room. Otherwise I enjoy it.