In your quest to find catigrls, you went to the earth core. Suprisingly, there are no cat girls there, and now you have to escape before earth explodes.
On your way out, you find ghosts of other adventurers who were searching for catgirls. In hope that you escape and find them, they give you abilities, altought you can have only one at the time.
WSAD - move
Space - jump
LMB - shoot