https://slin.itch.io/blobby-tennis
I'm a bit reluctant to call it a game as the content is very limited. It's free, integrates both, oculus sdk and openvr and works on windows and macOS. It doesn't have any written or spoken text and I could implement the FOVE SDK, but don't have a HMD to test with. Also it requires tracked controllers, which as far as I understand are currently not part of the FOVE package.