Hi, I’d like to please make a request on your own authored course using Godot to develop 2D competitive and/or solitaire playing card games. Please let me know, thanks. 
It’s not clear exactly what you’re asking.
- If you want to make your own game, having been inspired by our courses, by all means go ahead and do that. That’s what they’re here for! This outlines what you can and can’t do: End User License Agreement
- If this is a suggestion for a future course designed by our instructors, please indicate that. Normally, such a topic would go into the “Ideas” subforum, but the Godot forum doesn’t have these categories.