In search of the healing treasor

The story of " In search of the Healing treasor " is that our Hero has a sick friend who couldn't find any medicine.& according to a widespread rumor in the kingdom where they live,  there's a box in the castle basement containing the medicine that cures all diseases. However, no one has found it yet due to guards protecting the treasure. No one dared to enter the basement.But our brave Hero wanted to do whatever he could to save his friend.So, he decided to go there to verify whether this rumor is true or not. So would you be the Hero of " In search of the Healing treasor " ?!

Some infos :

-To move Left & Right : use the Left & Right buttons of the direction keys.

-To jump : use spacebar. ( you can jump only when you are grounded)

-To kill guards : use the sword by clicking on the left button of the mouse.Or, jump up their heads.