Easier ending - Win the game:
Get enough endurance to climb the big wall to the west, but also get the lightning power.
Climb as far as you can on the wall, until you reach the Fruit of Youth. Use your lightning powers to destroy the blocks in your way, then grab the fruit. This allows you to get the sword without having to get so much endurance. Then, just go back to the start and climb the ladder, grab the sword, and the end. =)
Plus this to keep it alive.
Agreed. I was sure it was going to be a trick question when you wrote "The answer is object 4".
But, I chose it anyway. Pretty stupid game, no offense.
 "BOXGAME"){kind=icon}
 "endeavor"){kind=icon}
 "Everybody Edits"){kind=icon}
 "The Light Temple"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Test Your Mind"){kind=icon}