Save the world?

I dont know what Im doing, I just code and somehow these things come to life. But this time I had a bit of trouble trying to come up with a game idea.

I settled on a top down shooter where you have to navigate yourself through a secured area to try and hijack a remote that has the potential to exterminate humans

IF YOU ARE GOING TO PLAY THIS GAME, HAVE A PENCIL AND PAPER WITH YOU, THERE ARE NUMBERS AT AROUND THE END OF THE GAME THAT WILL REQUIRE YOU TO REMEMBER SO... DONT TELL ME I DIDNT TELL YOU BEFOREHAND!