easy, you have to get knocked offscreen and get back onto the plats, I mostly just rely on luck. But it helps if you know how to dash, hold a direction and tap the other direction in the air, or tap z and x together in the air. Do that towards the platforms when you're offscreen and that should help you recover.
This is from [url/]http://www.dissoluteproductions.com/forum/index.php/topic,4054.0.html[/url]
