The slugs in Link the Slug are the result of an experiment gone horribly wrong. And, as science is blame for these colourful abominations, it's science's job to clean up the mess.

To do this, you need to use the power of electricity. Tap two slugs of the same colour and a bolt of electricity will zap between them, eradicating the slugs from existence. Each stage is complete when all slugs have been zapped from the screen. The trick is to clear the screen in such a way that your electricity jolts pass through the three stars dotted around the grid.

Stages quickly become littered with slugs, which can seem daunting. Once you start shocking the multi-coloured slimers off the screen, however, the solution usually presents itself fairly quickly. Once you get the hang of it, here's a decent sense of accomplishment which comes from pruning a grid full of slugs down to an clean, empty rectangle.

New variables are introduced during the game's 75 levels. These include beakers which change the colour of your slug, and scenery-destroying bombs. Although these add a sense of renewed vigour to the proceedings, the core concept does start to wear a thin a little quickly. Though its presentation clearly inspired by Zeptolabs Pudding Monsters (and its music by Cut the Rope), Link the Slug lacks their compulsive mechanics.

Despite its slick visuals and decent premise, Link the Slug never distinguishes itself from the heaving crowd of iOS puzzlers. It's a passable time-waster, but for those that have spent a lot of time exploring the puzzle genre, that may not be enough to justify a purchase.