Wow, that's wonderful news! I'm going to have to buy the Commodore 64 Ultimate, no question. I hadn't thought about it because I have my real C64 with KFF and CRT and I didn't see the point in spending money on this device, but this high score thing is a real incentive to do it, or I'll just buy the cartridge which I'm sure costs the same as the machine😂
Tested it today and it works on real C64 using the Ultimate 2+ cartridge too (also pricey, but worth it!) https://bsky.app/profile/c64cade.com/post/3murqlww4n223