Help Mana Move Movement Hit Hitpoints

There are three sources you use when playing here, your hitpoints, your
mana and your movement points.
 
Mana is used when casting spells.
Movement is used when walking around.
Hitpoints are used when you are hit by a weapon or spell.
 
As long as their value is above zero, you can use it.
If it's below zero you can't use it anymore, you have to
make sure it's positive again.