If you do not tantamount to it, there is a limited credit of free hints which you can use for the individual logos. Whenever it has been recognized a few logos again, the balance will be increased.
The quiz is challenging and rises from level to level. The fun factor is significantly higher than one would think at first glance!
Only the very disturbing mounted advertising disrupts the gameplay. With my Kindle Fire HD it face the "Next" button partially, so that clicking accidentally repeatedly on advertising. This provides a point deduction. The game itself is great though.