Pros:

• The concept of the game is quite unique and interesting. Though simple, this is one very addictive game. Why ?, because this is very difficult to solve.
• Free to play.
• Difficulty will increase as the level rises.
• Different balls are available (even if you have to collect diamonds to buy them).

Cons:

• Nothing.

My Thought:

• Although spelled out a simple and simple application, but the concept of a simple game with a high level of difficulty like this is very popular.