There are only two standard rules that I know of in putt-putt golf. You must use a putter when striking the ball and you must put the ball in the cup. You can make up your own set of rules if you’d like.
Many times you’re required to bank a shot to go around corners, it reminds me of playing bumper pool. There is the up and over shot where you’ll hit the ball over a mote of some sort, through the castle gate and into the cup. Usually the castle gate is moving up and down so some timing is also required.
If you’re looking for an inexpensive date or a place to take the family, try putt-putt golf. I think you and the company you keep will have a good time.