I really like this app. It has realistic track sound effects and sounds of people enjoying the ride. The speed of downhill travel is fast. It's fun trying to shoot the spacecrafts, although I have a glitch that the display for the points obtained is cut off partially. It doesn't take away from the enjoyment of the app. I also experienced the shutting off and blackout, but don't think it's related to the app itself. When I touch my phone screen periodically, it doesn't happen. That's like any device, if you don't touch it, it turns off. I recommend this app. I use a VR goggle that I purchased at Ollie's for $4.88.