Update [13] - A Battle in the Rain Add a rain effect on the tank factory scene. Need more details on the background.
Update [16] - Green Worm Add Green Worms to the stage. They are stronger than normal worms. You have to shoot twice to bring them down.
Update [17] - Enemy Debris I decided not to fade off an enemy debris. More work on sorting layers but it is worth it.
Update [18] - Smoke Particle Effect Add a smoke particle effect to the turrets. It looks better than I expected.
Update [22] - Tank Army In-Action No.3 (The Rollers) Fighting with the first boss. Destroy them before they reach you.