Magic Square Puzzle

What is magic square?
A Magic Square is an arrangement of distinct numbers (i.e. each number is used once), usually integers, in a 3×3 square grid,
where the numbers in each row, and in each column, and the numbers in the main and secondary diagonals, all add up to the same number.


The Puzzle:
The puzzle is all about finding those nine numbers and arranging them in such a way so that the Target Sum can be achieved.


Features:
1. Lots of new games in three difficulty levels - NORMAL, MEDIUM and DIFFICULT.
2. The sum for the entered number is calculated at run time to help the player concentrate on finding the numbers.


Feedback & Suggestions:
Your feedback and suggestions are the most valuable things to me as a beginner android developer.
Please drop in your comments. This will help me improving this app and encourage me to create more cool apps.

Thank you and have fun!