Tried this on my netbook a while back – about the same time as Defense Grid, funnily enough – and didn’t really get on with the controls, so it took me a long time to get round to trying the Xbox demo.

But, yeah, wow. I can see why the game is getting so much praise. Somehow, between PC and 360 the game has been absolutely transformed, from a fiddly physics-based key-tapper into a joystick-wrestling, white-knuckle thrillfest.

If there’s any way I can afford some Microsoft points then this is going to get bought. It’s amazing.