It’s a cool site and you don’t seem to be spamming. But your account is new and has only posted links to your site (4 times) which probably caught the automated spam detection system. I’d gently encourage you to engage with the community and share some things that aren’t your own work as well. From the guidelines:

Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity.