It's really cool to hear someone say they love something you made, thank you.
The idea came to me when I was playing lots of Skull King, a card game with its own set, and thought about how would a solitaire for the set play. I've always been a sucker for mini games inside of other games, such as the gwent in Witcher 3, or more obscure, the dice game in pirate of the Caribbean at World's end the video game.
About the ratio, do you mean the black bands at each side or something else ?