Thanks for the the detailed feedback! After the 4x4 it just gets faster because a 5x5 grid was simply impossible (for me at least). Because of time constraints, I didn't get the chance to implement a more complete settings menu, but that is something I will definitely do in the future. I think you're correct regarding the theme. It was the only idea that sort of fit the theme that came to me at the time (of course that doesn't make it better), but that's something I have to improve at. Thank you again for the suggestions.