The crucial part is missing in the Readme - how it works.
Nothing else matters until this bit is explained.
From the looks of it, it's just a proxy that forwards search requests to Google. Unless these happen to go out via Tor or similar anonymizer tech, that's hardly a "privacy-respective alternative to Google search".
If that's the case, then why not just use googler [0] since it only appears to send IP address, user-agent (which is set to Google Chrome) and search term to Google [1]
Edit: Forgot to add, also supports proxies.
0: https://github.com/jarun/googler
1: https://old.reddit.com/r/linux/comments/gayf4i/googler_v41_i...