Each of them may spend 10 points and at each level-up, they get a point.
Basic character:
Name: [any name] Level: 1 Hit Points: 50 Strength: 5 [Each gives you +1 max damage and +1 min] Defense: 4 Agility: 6 [Speed on battle and abbility to run] Weapon: A bat
Each point you spend on hit points, you get +10 HP.
Obviously, you start with astronaut suit, pants, helmet and boots.