Probably an example of what a minimal VPN could look like. I think it's more for educational purposes rather than to actually be used.
First person compared it to WireGuard, next person said yeah but it's probably for education, and I'm saying yeah but I think it's fair to compare it to WireGuard since the README doesn't make it clear whether it's a toy or a production tool.
And if you compare it to WireGuard then it becomes clear you shouldn't use this thing if you want real encryption.