Check out this kool C64 catridge. Fortunatly I left one C64 in life.
I saw this a while ago after following a link on the uCApps.de MBSID main page, tho they hadn’t got the cartridge version on the site then. I downloaded the disk images and tried them in CCS64, it’s a pretty good piece of kit. I highly recommend doing the same, 'cause it’s a pretty dang funky piece of software.