The release of PlayStation Move this week means the PlayStation Store has been flooded with Move demos.
Sony's Move controller is undeniably an impressive piece of technology, but the software so far hasn't quite shown how impressive. Sports Champions is half of a brilliant game, Start the Party is a trumped-up EyeToy title whose main distinguishing feature is that it works properly - and the less said about the mess that is Kung Fu Rider the better. In the absence of a genuine killer app, it's been left to this PSN title to show the big boys how it's done. As a demonstration of Move's capabilities, Tumble is pretty hard to beat.
Let's get the obvious question out of the way: yes, it looks a lot like Boom Blox, but it's not really much like it at all, apart from the occasional destruction challenges which are basically Boom Blox if it went to finishing school. There's nothing as uncouth as throwing stuff here; instead, you're asked to demolish a pristine structure using well-placed limpet mines. (It's a finishing school with access to military-grade explosives, obviously.)
Tumble is actually quite unsuitably named, since it's more about building things up than knocking them down (though it's probably for the best that Sony didn't call it Erect). At first, you're asked to build a structure using blocks of various shapes, sizes and textures. The idea is to stack them to a given height - or rather, three given heights, representing bronze, silver and gold medals.