Players try to make runs or sets, much like in Earth's Rummy, but the requirements for these combinations can be very different. Some versions, for instance, pjio immerseermit the use of cards that symbolize abstract ideas like emotion or time, which gives the game an interesting new level of strategy and originality. Play & technology. Players take turns drawing and discarding cards in an effort to outsmart their rivals during gameplay, which frequently consists of several rounds.