Reverse engineering the 2008 LogiCola, a logic drill program

LogiCola 3 is a cross-platform rewrite of the 2008 Windows-only logic drill program, rebuilt after feedback from Hacker News, GitHub and email. It restores infinite translation drills, features a refreshed UI using nine original colour palettes at three depth levels generated via RGB complement and Windows InvertRect logic, and recorded over 100 Asian device visits in one week, with 72 users completing at least one exercise—66 of them from the Philippines, mainly on phones and tablets.