VR Ninja was created by a small team here in Edmonton. I got a chance to try a very early build and it was a lot of fun (and good exercise!). Basically things come at you and you have to dodge them, but they did an amazing job on the environments and the positional audio. When a throwing star is coming at you from behind you hear it way before you see it, and that is both nerve-wracking and fun.
I have to pick up the full version, but if you try it let me know what you think!
p.s. Works with Oculus and Vive!