I'm the developer of Schwein MMU, it's German for pig due to the way it moves, plus it sounds cool. The flight physics of the game prevents me from getting motion sick. Since I'm also the one doing the testing and game balancing... So I'm sorry, I can't implement an arcade style controls, I've tried it, and I was about to vomit only after 5 mins.
I do my development at night after my full time job and in the weekends. I'm aware that there are multiple controllers in the wild used for Gear VR, but since I don't have the budget to buy these controllers, I released a Demo that people can try out first. Plus 6 degrees of freedom is disorienting for many people.