So Bumper.io is about wee round bumpers that look an awful lot like the robots in Nier Automata, all bumping into one another, trying to know each other off the edge of a ledge. And the stages you battle on are what make the big difference here. They go from wide squares, to far more narrow platforms that you'll have to navigate. Your knowledge of the stage layout will be imperative to your victories. They're random, so just try to memorise them as they come.