Primesweeper Number Puzzle Game
vole.wtfNice concept; surprisingly difficult. The sum digits to find multiples of 3 seems to be the fastest tool for the mind.
I do not see a link on the page for the creator of this. If they are about I have some thoughts about this.
(over and above "why have you allowed me to waste so much time on this" --- wry grin)
There are contact options both at the bottom and in the left menu though?