First off, overall I really like it. Feels like a great way to get into the rift. No real motion sickness and it looks pretty good!
As far as thoughts...
1) The "ship" seems to respond almost a little too fast. It feels less like a ship and more like a controllable camera in that respect. Not sure if that makes sense.
2) If that's supposed to be a chair I'm sitting in (behind me) it's huge. In fact the ship just seems to big.
3) Maybe add the ability to boost, for those open areas where you may want to go a little faster.
Overall nice work, I will sticky this thread to see how it progresses 🙂