There are games which use a lot of the buttons. Pause by the way is usually the same function as Escape. A bit like START on the Playstation. Gloom uses a few of them. The shoulder buttons etc.
There are games sites out there with legal games on them. I`m not sure if any do CD32 games, but if the ones which are legal do do them, then the games will not be pirated.
www.Back2roots.org is as good a place to start than any.