ItoIX

This game is an easy to learn, hard to master game against an artificial opponent.
You must position the tiles from 1 to 9 while hindering the opponent that tries to position the tiles from 9 to 1.

The rules are simple:
Click a tile: it switches with the corresponding value;
Three tiles of the correct value on a horizontal line: combo or extra turn;
A touched tile: not accessible by the opponent his/her turn;
Repeating the same combo 3x on a row: draw.

The tutorial can be found here:
https://www.dropbox.com/s/3o762u1dcol3vm0/Tutorial_ItoIXd.pdf?dl=0

Source code for educational purposes can be bought here:
https://www.assetstore.unity3d.com/#!/content/46016

Note: This game is made with Unity. A device with an ARM7-processor is required to play this game (most mobile devices dating from '13 till now). Older devices might run this game, but without sound.