I thought I'd done that type of movement with a Daleks clone years ago but I just checked and it's tap based rather than swipe based. This template shows one way of detecting swipe direction, though, and once you know the direction of a swipe it's pretty straightforward to move a set amount along a grid.
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@adent42 also, just went looking for the GS Viewer in the App Store and it appears it's no longer available? Apple App Store in USA
I thought I'd done that type of movement with a Daleks clone years ago but I just checked and it's tap based rather than swipe based. This template shows one way of detecting swipe direction, though, and once you know the direction of a swipe it's pretty straightforward to move a set amount along a grid.
https://armelline.com/downloads/Swipe-Factory.zip