The Towers of Hanoi is a classic logic puzzle that's been implemented on most computer platforms over the last 20 years. Now it's Symbian's turn, with this rather nicely implemented Qt version. The difficulty ramps up in the usual way and the graphics are clean and simple.  

Here's Hanoi Tower in the Store, priced at £1, though there's also a free demo to try if you want to check out the interface. £1 seems about right for such a simple game, though don't let the simplicity of gameplay fool you - it'll still take you many hours to work through the standard 'Hanoi' 'levels'.

The bottom of screen panel is an ad, but not in traditional form - it's a promo for the developer's other titles.

A nice graphical instruction screen - you get the idea.

Eleven discs to move across? Wow. That'll take some brainpower!

A game in progress

4 discs done - now on to '5'!

Yep, this might need some serious brain power....