Actually, input is fundamental to a game, because there's no way to make a game without input. It's one of the most important aspects of any game.

Making HTML 5 a serious gamedev competitor is one of the most important tasks facing the future gamedev industry, which means lessmilk is doing important work. It's important to call out the roadblocks so that the roadblocks get solved. It would be extremely valuable if someone were to do an analysis as to why the input is laggy so that future gamedevs can avoid that pitfall or that Mozilla/Chrome can fix their issue.