You are under constant time pressure in this take off on the Super Mario games. You have a very short period of time to complete a run through obstacles on your way to Princess Peach.

Use your right and left arrow keys to move.
The up arrow will make Mario jump.

Move right through the obstacles, avoiding anything lethal, and get to Princess Peach before your very limited time runs out and you will move on to the next level.
Of course you will get bonus points for any coins collected along the way.