Terrain Defender

Terrain Defender is a game about stopping Inconsiderate Campers from advancing while they leave trash across the map. You have 24 seconds to create the map, split into two 12-second periods, using the mouse to edit the terrain.

Place trees and stones for the campers to bounce off and slow their progress. Garbage bags can add waves and points, except when you collect the last one. Two or more bags close together cancel each other out, so you can miss out on their effects. Campers appear from random directions, requiring you to adapt your map.