TinyCraft is still in the works, what you downoaded is just a beta. It is a portage of Notch's MiniCraft for the z80 calculators. It will run on any z80 calculator above 83+. HOW TO INSTALL: Send to the archive: -TinyCrft.8xk -TCTitle.8xv -TCdata -TCGEN HOW TO PLAY Run the app called "TinyCrft". Just don't forget to hit "New game" and follow the instructions before loading. Every keys are configurable except two ones: [Sto>] to save your progress and [ON] to display the MiniMap.