Hi, fortunately I wasn't affected by this but I do have one thing to say as an experienced web dev and that is that it is taboo to have a delete button, of any kind, without a warning.
The software has to give clear indications of what the users actions entail especially if they are irreversible.
This is a major break in any type of UX that the website tries to display to it's users.
I don't know which environtment the itch.io website was built on, but I dont think that addind a standard browser alert can be that difficult.
Not shitting on the dev team, as oversights are merely part of the job, but i hope this gets fixed so more people dont end up deleting their games.