how can I delete my account ?

When I tried to play with cell phone, I did not know
how to set up and made some redundant accounts.
How can I delete my account ?

Try deleting email address, then reset password, maybe every so often email-less accounts are deleted?

I doubt that.

Offering a human sacrifice under a harvest moon is the only way I've been able to remove an account, but the site has been updated significantly since then so I don't know if that still works. Your best bet is probably to message Richard and ask--which is what I should have tried first, but social anxiety makes approaching people difficult.

https://www.littlegolem.net/jsp/message/webmaster.jsp

Oakmoss, a lamb might work too?

Nah, animal rights and everything, you know ...