I didn't take a picture of my sandwiches, so instead I grabbed this off Google.

OK, egg sandwiches consumed, I now have an idea that actually is a game. Maybe.

You, archaeologist Ted Stuart (because archaeologists are always action heroes, for some reason) have wandered aimlessly into a cave that has laid undisturbed for millennia. Well, or so you think. It’s actually been disturbed rather frequently by all the dinosaurs living down there.

Living dinosaurs would make your job a waste of time, and so to preserve the livelihood of archaeologists everywhere, you seek to destroy them all! However, your puny gun is no match for their unusually tough skin! Your only hope is that you can shoot down loose rocks from the ceiling to bonk the dinosaurs on the head with. Only then can you remain safely employed in these harsh economic times.

So, yeah, lots of waffle to describe a game of very limited gameplay! I can think of other uses for dropped rocks, but that’ll depend on how much time I have after.