You control Jack - a cute-looking blob with feet and antennae. Smiling balloons descend from above and, bounce around generally making a nuisance of themselves.

There are a couple of ways they can be disposed of. The straightforward method is simply to jump on them. Failing this Jack can pull and push the large blocks conveniently lying around the place to crush them. Push the wrong block and you could end up under a pile of them yourself.

To keep an eye out for the smiling balloons which have an annoying habit of jumping on you when you're not looking. The object is, of course, to destroy everything that moves in order to progress to the next screen.

Certainly an addictive, high quality game, rather like mayhem on a trampoline with a few breezeblocks chucked in for good measure.