I just published Gambler's prep school l, a game that will let you gamble to your hearts content. It's made in Ren'Py, and will showcase available script for diferent luck games, to be put in your visual novel.

In the 0.3 version the game is fully playable, just limited on what games you can pick. Clearing the game in the current version is also possible.

Give it a try and let me know your thoughts after.