Use the instance of your main class, not the actual class itself.
You are actually giving the player strength 4. Use an amplifier of 2 to get strength 3.
You could create a method which generated a new scoreboard and displayed it to the player. public void updateBoard(Player player, int level){...
From looking at the JavaDocs, there doesn't seem to be a method for setting the HurtEntities tag of a FallingSand entity. Is there any other way...
Here's your competitor plugin.
This plugin should suit your needs.
You need Java 7 It does run on 1.4.5, I'm running a server with it just fine.
Are you using the latest Java? It should work with 1.4.5
http://www.oracle.com/technetwork/java/javase/downloads/jdk7u9-downloads-1859576.html
I may have stumbled upon the most fun gun of all time. Of course, you have to be in creative or god mode unless you want to kill yourself...
Sadly, no :(
Add the following line to each gun/grenade: rightclickfire=true
Finally got this plugin to work, I found out you need to install JDK 7u9 :P
Separate names with a comma.