At last! I have prepared an online demo of Haberdasher. Now you can play around with it, as an anonymous user or logging in with demo/demo123.
It has a limit of 50K for patches, so don’t be surprised if you upload a bigger one and it gets truncated
Have fun, and tell me what you think!
EDIT: The link to the demo was wrong, gah! Thanks to Joaquín for noticing.