Controls in Super Meat Boy

I started playing Super Meat Boy and I am playing it with keyboard. I am having some troubles with controls. All the menus and tutorials show the 360 controller and I cant figure out what which button on keyboard does. Can somebody tell me how the controls on keyboard work? Also can you change the controls?

not sure, never tried it with a keyboard and never will.......i shudder at the thought of playing this game with a keyboard, lol

yeah I'm going to use a wired 360 controller.

Just viewing gameplay vids alone makes me wince at the thought of using keyboard and mouse.