Your site https://microlandia.city and OP blog https://www.arthurcnops.blog/death-of-show-hn/ as well as most personal sites posted on HN are almost always inaccessible via my corporate job's firewall. Does anyone know why this is? Something with security certificate? They're not explicitly blocked, because you get a "this is blocked" page in that case. With these sites they just show a "can't connect" error.
You shouldn't be browsing games while working, that's why
They probably have a newly registered domain rule.