Work only with JomSocial points or AlphaUserPoints, players need points to play with the slot machine and you have full control of the amounts of points your member win. I add 4 news rules for JomSocial and AUP.
Requirement : JomSocial Points system or AlphaUserPoints
I use it on my Jomsocial site in combination with AlphaUserPoints and my members like it as well.
It is easy to install and you can customize it also for your needs (design PSD is uncluded).
A great module!