The game is designed for people who don't want to be nagged. They just want to get a better score, and they don't want any ads, or in-app purchases, or the like. It has great replay value, because you slowly start to understand how best to use the combo system once you get going. It has a truly satisfying feel to it, when you get more than one worm going at the same time, and when you can chain one combo into another.
