I've made a slew of iOS apps, a jigsaw puzzle site based on Unsplash photos, and I've even co-founded a venture-backed startup with an American friend. Recently, I've ventured into making a physical product, a jewelry box made from solid oak, which is a whole blog post onto itself. Despite all of those efforts, the solitaire game that I've run on the side throughout most of my career has proven to be the most successful.