Scratch

Hi st4282, usually when you have a scripting problem, it's best to post under Help with Scripts.

Anyway, on the bullet sprite:

when gf clicked
forever
    if < touching [sprite] >
         change [score] by [-1]
    end
end

You may also want to put a

 hide 

in with the change score block if you want the bullet to disappear after hitting the sprite. 

pi3 wrote:

Hi st4282, usually when you have a scripting problem, it's best to post under Help with Scripts.

Anyway, on the bullet sprite:

when gf clicked
forever
    if < touching [sprite] >
         change [score] by [-1]
    end
end

You may also want to put a

 hide 

in with the change score block if you want the bullet to disappear after hitting the sprite. 

That wouldn't work all the time because if the bullet is going slowly, it will still be touching the character. A better script is this

when gf clicked
forever
if <touching [main character v]?>
change [score v] by [-1]
wait until <not<touching [main character v]?>>
end