Honestly pretty fun for what it is. My biggest complaint is choosing to start spinning the camera - instant motion sickness. Had to stop playing after that.
I also didn't super understand exactly what I was doing / how to play the game. I just kinda moved and sometimes was shooting. Controls put into the page description would have been lovely, would be happy to play again once the controls are listed somewhere outside the game (as navigating the level-select without really knowing how to play was kinda rough). At least for a little bit anyways, the motion sickness will probably stop me from doing a full playthrough.