I posted my project on HackerNews today and ended up on 2nd place for "SHOW HN"! Definitely a very good validation, and a lot of work ahead.
https://news.ycombinator.com/show
HackerPen website: https://hackerpen.io
Many people comment that the product isn't necessarily making tech interview "better". I think beyond just better UI or whiteboard, there are many things about tech interview that are fundamentally broken, like interview expectations and feedback.
A lot of more work ahead!