Played on ps2 console with fds enabled (model 75001) I found a boundary skating route here that takes you to a wall right between the boss and the three tanks you have to destroy. This is another level where you do need to do multiple objectives. Just fighting the boss won't end the level on its own. This can be improved quite a bit, both between getting to the fight sooner, and also performing the fight much better. I would guess at least another 20-30 seconds could come off of this.