lose/pick up souls when dead like in Dark Souls?

Has anyone done anything like this with Construct? Basically when you die in dark souls you lose your souls but can go back and pick them up again. But if you die again and didn't pick them up you lose them. I am interested in doing this with my points which I can spend at the end of the level. I wouldn't even know where to begin with something like this, most likely instance variables but how would I remove and re-add my score at death?

If you're talking purely about the first part of that you could spawn the souls where the player died then set position to a previous checkpoint. If you go between layouts you can give the soul object 'persist' behaviour so they stay there until picked up.