I don't think the shots themselves were too challenging, but I know I had some trouble telling if I had the right number of A-Zone hits or if I should keep shooting. That could partly be due to using yellow glasses indoors, though - they doesn't do much to highlight brown targets. Or maybe it gets harder to see holes as stickers build up. Or maybe I should move up to something that makes bigger holes. Or maybe I should just go get my eyes checked.