Ranked in these QuestionsQuestion Ranking
Pro Different completion levels
You can aim to complete every level but there is also an additional star on each level for completing in minimum moves which can be easily attained if missed by replaying levels.
Pro Free play
Supported by adverts but if you choose to buy additional level packs to support the developers then these are removed.
Con Too many advertisements
While the in game banner ads do not really detract from the gameplay, there are full screen ads that interrupt play every so many levels, which takes the player out of the game. Purchasing any in game item such as more levels or themes, the ads will be removed, but for those that would like to play for free, the full screen ads may be something to consider.