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The Silver Award-winning Blek is one of those games that could only work well on a touchscreen. Which is why you should buy it when it goes cheap.

That's a hint, if you didn't catch on there.

Yep, Blek is currently on sale on iOS at 69p / 99c, down from its full price of £1.99 / $2.99.

It's a puzzle game in which you have to collect coloured circles in a 2D white space by drawing a line that wiggles through it.

You can see how it works in the trailer, as trying to explain it with words rarely does it justice.

In our review, we said that Blek is a "smooth and clever puzzler," that was only let down by "its frustrating moments". That doesn't stop it from being "an impressive, creative package," though.