itch.io

The most difficult aspect would be to rework all the controls to function with just a touchscreen, which means there's no mouse hover and no right-click

Maybe you could make it so your streak doesn't reset if your very first move is pressing the Redeal button

Signing Solitaire Mystery with the default LOVE2D runtime bundle on macOS can be done within minutes, but if you're planning to add Steam Achievements it might take a bit more time to make those work on macOS :P

This game was made with LOVE2D, which can work on Mac if you do this: https://itch.io/post/9819297