This is a parody of an old pornographic flash game "Angel Girl X" by koooonsoft.

1123581321345589144 said:

This is a parody of an old pornographic flash game "Angel Girl X" by koooonsoft.

Oh that takes me back.

1123581321345589144 said:

This is a parody of an old pornographic flash game "Angel Girl X" by koooonsoft.

Someone made an affectionate parody of it on Newgrounds called Demon Girl.

EDIT: Holy shit, I got it backwards. Demon Girl predates Angel Girl X by 6 years. koooonsoft even says he was inspired by it in the menu for Angel Girl X.