I’ve noticed this as well. I think it has to do with PAL vs NTSC copies of games and the different frame rates for each. I don’t have a solution though. For some reason, if I run NTSC versions the game play becomes extremely janky after a few minutes.Badda, Brilliant emulator, I can now keep my commodore disks safe! I found one issue, seems the side scrolling is a bit jerky sometimes?. I.e. the Tape version of IO, on the demo screen, it glitches when the background scrolls. I tested my friends PSP C64 emulator and it is perfectly smooth. I did try a few different tape images! Keep up the good work.