Hello dear, I'm working on it right now. If you are using the system of healthbar the one which you don't need to care about HEALTH but about POINTS, so you can create an object that give you "-1 POINT" and it works fine for me. To do it, search on youtube "BUILDBOX HEALTHBAR" and follow the OFFICIAL tutorial made by Zak. You will be able to work well with Health as it happeaned to me.
Then how can i create a action that always gives -1 point whenever i land on it? The action should not vanish after i take it.
Create an action, choose type of action "NONE" or "COIN", then set as following: REWARD COIN: 0 UNFLAG SHOIN COIN REWARD REWARD POINTS: -1 SHOW POINTS REWARD: UNFLAG(or keep, up to you) DURATION: 0 Then edit the collision shape. Hope it help.
What you gave works for one -1 point, but every time i hit the same enemy it should reduce -1 point. I mean the action should not vanish once i take it.
You’ll have to have an Object spawner that spawns an Action ever X seconds. Then position it in the most optimal position so your character can collect it. If you search the forum, this topic has been covered before. One even had a BBDoc template to show you.