Simple mechanic, made funny if you imagine the guys arguing with each other the whole way. "NO! YOU step on the button, I'm running to the next room!" "You are too slow! TOO SLOW!! We will never make it with you slowing us down."
The reason that some paradoxes seem to randomly happen is framerate issues. As you get a lot more robots on screen, it slows down, messing with causality. A little annoying, to say the least.
It loaded for me, but its buggy: more consistent crash detection would be better. Having to scoot around on my roof for 30 or 40 feet before it lets me start over is annoying.