Comment by tombh

Thanks for trying it out. It looks like either your terminal or screenshotter isn't faithfully rendering the pure red marker column (it's needed for calibration in the parser). The red should be #ff0000, but the screenshot is using #ea3323. I've made a Github issue to keep track https://github.com/tattoy-org/tattoy/issues/98 If you can add more details it'd really useful, I'm sure there'll be more people like you.