I'm not. But I've considered the possibilities and mines would add some more tension to this.
However there's only one thing I worry about, what if 4 racers just spam Mines like hell resulting all or the last 3 to explode cuz someone is CDing the heck out of them? I'm asking for input, cuz I see a high possibility that this may happen.
I'll prolly add 2 or 3 game modes in which one allows Mines. I think that's a better idea.