Reddish floor: Burning floor. If you land here, your spaceship burns and you must start the level over.
Dark green floor: Sticky floor. These slow you down and eventually will stop your ship.
Gray floor: Slippery floor. Be careful when maneuvering on these so you don't slide into trouble!
Lime green floor: Boost floor. These speed your ship. If you stay on these floors long enough, your ship will reach its full speed.
Blue floor: Supplies floor. These replenish your oxygen and fuel.
Pipes: You can travel through (or, if you're a daredevil, over) the pipes. However, you can't see inside them, so beware of holes or burning floors inside them. There is a pipe at the end of each road, which you must enter to 'beat' it.
Blocks: Blocks kill you when you crash into them at high speeds, but if you crash into them at low speeds you'll be fine. Many times there will be "hurdles", or several blocks close together which you must jump across- either inefficiently slowly, or with perfect timing.