In this collection:
Collection
you find this scenario:
Tutorial scenario
which has a link to a course about Greenfoot 2.2, including it's scoreboard.
It's made by me, so if you've got questions, just ask me :)
scoreboard works great. but could you have a look at the scenario and let me know why the Hunter dies after a single bullet? Its not the first Hunter but the 3rd or 4th.....