It's easily my most played VR game. It's based on the same engine as Audiosurf and just like Audiosurf you can use any of your music or audio files to generate levels.
In Audioshield you have two shields strapped to your arms, one red and one blue, while different colored orbs fly toward you to the beat of the music you're listening to. Orbs are red, blue, and purple. Block the orb with the correct shield (or both shields together if it's purple) to score points and get a multiplier going.
And that's about it. It doesn't sound like much but in VR it's very physical and the fact that you can use your own music means there's always a fun new level to dig into. You can also compete in the online leaderboards with the top popular songs as well.
I actually listened to the whole Hamilton soundtrack while playing this game since I've been obsessed with it lately. It was a fantastic experience.
If you get a chance to play with room-scale VR I highly recommend Audioshield. It's one of my top two games for VR so far!