C - Orange Portal V - Blue Portal Arrow keys or WASD moves the character. Mouse aims the portals.
I'm bad at making collision so you can walk through walls. If anyone knows how to make wall collision, please tell me. I'll add it as soon as possible(I tried the wiki tutorial, it doesn't seem to work). If portals don't place, you might be aiming at a bad angle, they place when a direct shot facing the wall or floor is made.