Haha, yeah, I also think it's quite a challenge to get the controls changed in the middle of the game. There's also a bit too much going on at once. I think some deceleration is needed, maybe the switching will be a bit gradual and maybe you need a cooldown that limits how fast the player can change the rules.
Thanks for the bug reports. Some are indeed bugs and some design decisions could have been more elegant. The fog of death was supposed to kill you - I'm glad that worked. However, I think the "endless runner" aspect combined with too much freedom to run back and forth is a bit confusing.
I'll look into fixing the bug of why you sometimes only have one life left after a restart.
Honestly, I don't know why my highscore table isn't working, I only do Unity.WebRequests, but I've seen other submissions with working highscores, so yeah.
Thanks for the feedback! Much appreciated!