This is a neat little game that helps users take a mental break when they need one, and very well done with a nice, clean UI. I can think of a couple improvements, however, that would earn Hex a fifth star from me. 1. Currently Hex uses light colors while solving and switches to dark upon completion - I’d like to have the option to switch this, as I think the dark is more visually appealing. Long-term, I’d prefer the dark mode for both pre and post solve, with some other visual effect displayed after solving. 2. When making a purchase to get rid of ads, Hex isn’t forthcoming about what users get with the various purchase levels besides just no ads. 3. While Hex has an annoying habit of crashing on occasion when opening it, I’ve since discovered that if you have airplane mode turned on while playing, this fixes the issue.