The file called "citycat.crt " is the C64 ready one, however it still needs to catch up with the Windows prototype version which is quicker for me to develop before asking the Megastyle team to continue with the C64 port. The C64 version is working but an older version. There will be a C64 version once the Windows prototype is fully complete, then we will consider making a physical version later. In any case you can only play the .crt file via an emulator like Vice for now. You will have it for commie, just wait until it's fully developed =)