They will be a thing, eventually :)
There are others who have requested that, and honestly we're interested too. But adding things ultimately takes time, and we currently can't give you an accurate approximation about when it will be available. If you're interested, just install the demo version using the itch.io desktop app so it can be updated automatically, or follow our itch.io account as we're always make a new devlog when an update to the stable and demo builds are released.
Thanks for your interest!