Cave Story/Labyrinth

Labyrinth Jumping
You wake up in another cave. There will be some blue robots nearby who you can talk to, but they don't have anything interesting to say, so shoot out the breakable block and save. Once again, this part is going to be difficult if you don't have the level three machine gun, but the spur is worth it. Equip your newly acquired blade; it can kill the purple critters in one shot. In fact, it can kill almost anything in the labyrinth in one shot. You will be relying on it a lot, so don't neglect it.