Catacomb is a very challenging game, congrats.
You really have to master the bagatelle as well as possible in order to fill up the 'toast'. Requires very quick thinking but the key to higher scores. I've only completed it once.
I find trying to explain the rules to others is now tiresome. You really have to invest time into the game to really appreciate the complexity. Has to be one of, if not the most challenging of the classic Sterns. Go Joos Jr., go.
Awesome looking game too.