Movement:
Player 1: A, W, D keys

Launch a portal:
Player 1: Left mouse button

Launch a blue portal:
Player 1: Q key

Launch a yellow portal:
Player 1: E key

Close both portals:
Player 1: R key

Pick up an object:
Player 1: F key

Open up console (enabled through the options):
Player 1: ~ key

Quick quality adjust:
Player 1: O key

Pause game:
Player 1: Esc, P keys