At the moment we do not offer a programmatic way to create a project page. Part of the reason behind this is we want to avoid mass generated pages or spammy behavior.
I think we would prefer if someone publishing an game through a tool, that they create the page ahead of time and tool is only responsible for adding the files to the page. This way we can guarantee that all page creators see all the same UI and have the opportunity to fill out any required information and metadata.