I immediately got this game when I saw it. I have always loved the Katamari Series and I don't see why Namco Bandai just doesn't port Katamari Forever to the PC.
So this game is very much a Kamatari Clone. You pick up items sprawled around the ground by running into them and grow by picking up more items, which in turn allows you to pick up even more, bigger items.
The visuals are very simple and the music is fun, just as in the Katamari series.
I payed 1,99€ for the game and finished it in 1 1/2 hours, but those 90 minutes passed without me even noticing. You could get more out of it by trying to rank A+ in each of the 12 levels, but that would be very hard. The game definitely is a lot of fun if you like different experiences.
So decide for yourself if it's worth it.
One thing you should keep in mind is the technical limitations of this game.
The resolution locked at 1024x768 and there's no anti-aliasing without a way to change it. It doesn't look amazing streched up to 1920x1080, but it didn't bother me after 5 minutes.
The game also works fine with a Xbox360 controller, but only for moving your character. All the menus have to be controlled with your mouse and keyboard.