not utilizing the 2d arrays
Using a single array is actually really easy; I don't have it on hand but there's a really simple formula for determining the X/Y coordinates from a number. This helped me make a rescalable Tic-Tac-Toe variant.
I was just bored when I made this, I was going for something simple ;-;
I don't understand why you felt the need to share this, though. 90% of the stuff in Creativity is people posting cool and interesting work that usually takes them a while to do, whereas you just whipped up something I'd expect to see in the introduction on learncpp.com.