How do I get started?

Hint 1 of 5:

Push the "up" arrow on the keyboard to move into the tube.

Hint 2 of 5:

Experiment on the basement floor; it is safe.

Hint 3 of 5:

See if you can push the bottle cap.

Hint 4 of 5:

(It is stuck in the foot-print shaped depression.)

Hint 5 of 5:

Turn the cigarette butts around a bit.