Lightweight backlog mgmt tool - looking for a feedback

I have been looking for a “perfect backlog management tool” for many years. Eventually, after checking out many of them, I have just launched my own: https://www.storyhub.io

This is my first product as IH and I am very eager to hear any feedback on the idea, the landing page, and the application itself.

BTW. I am looking for a non-tech co-founder.