Assault/Progress Planetary Circumstances

It is possible for your tank to drive over the edge at the end of this introductory area - when you approach the two Type 1 Cannons, take out the first one and attack the second one until it is eight regular shots (or two nuclear missiles) away from being killed. Make sure you're near the right wall and facing the second cannon, then back up. Once the cannon is almost at the top of the screen, pop a wheelie and fire a nuclear missile at it. You should then drive backwards and turn the corner to your right before the "Stage Clear" message appears; if you have performed the maneuver correctly, your tank will end the stage by driving over the walls into space.