Defeating the Grim Reaper
The Grim Reaper's attack that does lots of damage cannot kill you. No matter what, you will have 10 health. Attack him each time that you have more than 25 health, which is the set amount of damage that his other attack will do. Whenever you drop below 25 health, use a health potion and you will never die.
Extra HP
Save the game at the old man with orange robes that gives you the free armor. Die, load your saved game and enable the thebestdress code at the old man. You will gain 1,000 HP each time this is done.
Extra skill points
Go to the man who gives you the moon ring. Go to the moon and press [Space] for an extra skill point. Save the game, refresh your browser, and start a new game. Lose a battle, lose, choose "Load Game". and go to the man who gives you the moon ring. Go to the moon and press [Space] again for another skill point. Repeat this as many times as desired.
Defeating the Grim Reaper...