Flip it's a simple puzzle game that come in 2 different game logic:
Square, Each time you tap on a white or black piece all 8 surrounding pieces swap their color.
Cross, each time you tap on a white or black piece the piece itself and the top, bottom, left and right pieces swap their color.
Your goal is to reproduce the top left schema.
Tapping on top left schema let you choose a level to start from all already completed levels.
This version come with 99 levels for Square puzzle and other 99 levels for Cross for a lot of fun.
From version 0.3 you can choose between easy or hard gameplay or between timed challeng.
When select a timed challenge you need to solve a serie of increasing difficult challenge.
Each level add a move, so the level 1 need only one move to solve, level 20 need 20 moves.
Before you start, the game itself play for you the correct sequence of moves needed to solve the level. It's easy to remember at first levels, hard after 5-8 levels.
The game feature 10 different move sequences, each time you choose a timed challeng, the game choose one of the 10 sequences to play for you.
Each combination of game/sequence/levels has his own high score table.
You can choose a timed challenge of 5, 10, 15 or 20 levels.
I suggest to start with 5 or 10 levels.