kuraobi on 10 December 2007
The bouldergeist is not very hard when you understand that you should stay quite close to him while running around him, so he doesn't have time to attack you while you're getting the bombs.
The second trash guy star was definitely the hardest for me. You try like 30 times before even understanding what's the good place and the good order to throw the bombs. Then you try 20 times more to do it perfectly and finish like 0.1 second before time's up.
