Bought this cause I used to play it in Win 3.1. 20 years later, it still has me sucked in. The only game I've had that can cause me to play for 2 plus hours straight. I know its a simple math game. But nostelgia got the better of me. I love the simplicity, and it is still fun to shoot floating space junk with numbers attached to them. The seller sent this promptly, and in great working clean condition. I'm thrilled my nieces will love this game as much as me.