oh ok,
make a variable(or textnumber) for each player lets call it health
on create actor health(or health.textNumber) += 5000
on (action that causes damage) health(or health.textNumber) -= however much damage
and to heal on collision for healer destroy actor and healt(or health.textNumber) += however much
kinda simple but i probably confused you if you dont understand just ask
ps: how come you dont download the newer version of GE?