I like it ! But the movement of the turtle is very slow! And.. the movement should "blocky" (i think change the super constructor at the world class.. super(20,20,50) , 50, not 1 The explosion should slower :D

oh thanks ^_^" you should join Greenfoot-discuss google groups at here: http://groups.google.com/group/greenfoot-discuss

hmm, because cannot use world (or a class) from level, I use method for change level maybe the method is like.. reset_world(); and... level1(){ addObject(.....);} level2() so on.. or use level(int level){ switch(){case 1:...2:...}}