Shufflepuck Cafe ran on the original Macs, which were 8MHz and had between 128K and 512k of RAM. (I never had access to a 128K machine and don't know if Shufflepuck worked on those.) This is still an incredible achievement of course! But the types of Macs that ran at 16MHz with 1MB RAM were probably incompatible with the original Shufflepuck as it was coded with the original Mac screen resolution firmly embedded into the design.