You can enhance your Rummy Boss gameplay & sharpen your memory by honing these skills in casual games. Even though Rummy Boss can be a fun game, players can imrummy now appprove their chances of winning by avoiding a few common mistakes. Keeping valuable cards for an extended period of time is a common mistake. If your opponent declares Rummy before you can use them, these cards can turn into liabilities even though it might seem wise to hold onto them in the hopes of creating a meld.