How do i download and play by android? i have a phone and VR...
For Android you download the .apk file (BFP_demo.apk), preferably from your phone, and install it directly.
For VR, you need the Windows version (assuming you have a VR headset that connects to your Windows PC). There is an [XR] checkbox at the bottom right next to the Fight button, on the screen where you select the arena. If you check that you should get it to output to VR. Note that activating VR means you get to watch the match, but won't be able to control anything.