Space Fuck!

A father gives his son a space suit on his deathbed. Using the associated jet-pack the son ascends from the subterranean tunnel system he has always known as home. On the planet's surface he discovers a metropolis in ruins, and a sole survivor who tells him, "Planet "X" did this."
Leaping in a nearby legged tank, he takes to the sky. All of this the player is able to control by using the arrow keys, several other keys are used to operate the space craft which can shoot and transform between a walking and flying form.