Humans versus Aliens

The goal is to destroy the alien military base. The red figure is the human protagonist, spawned at the upper right corner of the map. The player controls the protagonist with arrow keys. Collision with alien patrol or cannon bullets result in the deduction of 1 health point. The starting health is thirty points and the game is lost if all the health points are deducted. Victory results from the collision with the alien base, which is the gray mosaic block.