Well, the concept of the original Lemmings games only works with a mouse-based interface which enables you to (more or less) precisely pick out one Lemming out

Well, the concept of the original Lemmings games only works with a mouse-based interface which enables you to (more or less) precisely pick out one Lemming out of the crowd you have milling around on your screen. But there are a few good "save-em-up" games (as the category created by Lemmings was sometimes called in the nineties) for Android. The one I enjoyed most was World of Goo - however I don't recommend playing it on a phone, and it probably also is more enjoyable on a PC with a mouse...