Link to the game is here. I found it via another site, but reading through the comments on that site now has some spoilers on the game.
Instructions from the game:
"Click stairs and move.
The 16th floor is a goal.
Cooperate by oneself?!"
Pretty self explanatory, with a little teasing hint. Goal is to get to the 16th floor by going up all the stairs. You can click the triangle-shaped things to increase your score, but the real goal is to get to the top.
The game is rather clever. Give yourself a few lives, and you'll figure out what the last line of the instruction means.