n-Challenge logic puzzle

The GOAL is to have all the tiles in numerical ascending order, starting from the first row .

The RULES are simple:

- Initially you'll find the odd and even tiles on separate rows. You can only move the external tiles of the puzzle and only one tile at a time
- Each numerical tile can be followed by a tile of greater value
- Be careful! With advancing levels appear with increasing frequency some lock tiles that can be eliminated only if accompanied with other lock tiles in a blank row.You can move the lock tiles, but you can’t move the numbered tiles on a row containing a lock .

Other FEATURES:

- Premium version is FREE if you invite a friend (see below)
- Tutorial with the game instructions
- Mute option for music and sound effects
- Option to sharing your score on Facebook
- Three different skins for the game window (Premium)
- 12 game levels (some Premium)

You can get the Premium version of the puzzle in two ways:

1) FREE inviting a friend. Enter his e-mail address on “Invite”: he’ll receive a code and, after he installed the app and entered the code on “Help a Friend”, you’ll get a free Premium version the next time you’ll load the game
.
2) Buying the app on Google Play store by clicking on “Buy”

Are you still so sure of being able to count up to 15 ? To find out, you just have to try n -Challenge !