I get a lot of my Tech info from this guy. Been reading him for years in my RSS feeds and every once in a while, he throws a game in the mix. Thought you might like this one if you are into puzzles and basic maths…Sorry @Gnuffi.
“Blocksum is a Japanese game that supports English. … I made the decision to link to Archive.org in the Summary box for easier downloading.” The Summary box is down below in this article.