When a player fills in a square you should probably make it so that all the numbers that were previously penciled in in that square are removed.

It was working before, now it just won't start.

Zen of Sudoku is now free-to-pay, but I want to to bind it to my account. Is there any shop where I can buy a Steam key?

Crowded here huh? Steam achievements would be dope. I need to feel I'm getting somewhere in my life.

I had played, I think, over 1800 games. but, when I opened up the game today everything was reset to zero like when I first started it. I am soooo disappointed. I had played this for years, and now it's all gone. We have had power outages a few times since the snow came - could that have caused it? *sigh*...