If you'll pardon the pun, please, readers, developers of Edge Mobigame appear to be on a bit of a roll lately.

Firstly, they finally obtained the trademark to the term 'Edge' in May after one of the longest and most bitter legal disputes in mobile gaming history.

Secondly, they released Edge Extended, a pitch-perfect iPhone sequel to the aforementioned cube-shifting puzzler.

It's good to see, however, that Mobigame haven't forgotten their roots throughout this purple patch, as the company have just issued an update to the isometric brainteaser Edge.

For those of you who found the pace of the 48 levels that comprise the Edge Challenge too easygoing, news that 16 additional stages of greater difficulty are now available to download should seem like manna from heaven.

You'll have to hand over some wonga for these bonus levels in Edge, mind: 99c, to be precise.

Your noggin will thank you in the morning, though.