I've experienced the same issue with my Coco 3 (NTSC), 512k RAM. Loading the .DSK from a CoCoSDC and outputting via composite. There is also some text issues at the bottom of the title screen. Here is a vid:
Thanks for the video, and for being patient - I've passed this on to Pere and hopefully we'll fix it soon!
updated game added, please try and let me know if the issue persists.
please try the new version, thanks!