Magic-15

It is a simple and addictive puzzle game.
The goal is to get 15 across rows, columns and diagonal.
=== HOW TO PLAY ===
* Place 1 to 9 numbers anywhere on the board such that the sum of all rows, columns and diagonals is 15!
* Tap on a cell to choose a number.
* Long press a cell to either clear it or move/swap with other cell.
=== FEATURES ===
* 5 different levels each increasing in complexity.
* Option to resume the game where you last left
* History of each level