Finally, I finished Infinipicross.
This game is a kind of like Sudoku. At little level it’s fun. But when you have 4950 places, it’s very long and difficult.
The real trouble is that you have no solution to save your advencement. So you you have to play the hard level in a row. That will take you around 2hours and half.

Edit: And I just finished Goocubelets. 2 games the same day ;)
I’m near 50% of succès of my beginned games;)