There's a small points threshold before a submission makes it from /shownew to /show. This is in the FAQ: https://news.ycombinator.com/newsfaq.html.

This is a good Show HN, though! so if you email me at hn@ycombinator.com, I'll help you and then put it in the second-chance pool (https://news.ycombinator.com/pool, explained at https://news.ycombinator.com/item?id=26998308), so it will get a random placement on HN's front page.