The former cover that shows Globama sitting on the beach in front of the blockhaus, and Mogette chatting with Bonnotte while walking along the shore, did not give a good idea of the story. I spent a few evenings designing a new cover, where two rat-men are helping a young megaweed take its first steps towards the sea. Globama protects the operation with an assault rifle. Since Bonnotte is a secondary character, she stayed home, and Mogette walks her dog alone, oblivious of what is going on behind her.
To design this cover, I used a very old version of Photoshop: