First concepts

I had some time to make some drawings for Hollow Planet. You can see the planet and the big tunnel shafts that go through it. How they came to be is pretty unknown, but it probably has something to do with giant stone worms ;)

The first drawing shows the planet and one of the tunnels going through it. The second then shows the main protagonist ready to jump in, and lastly there is a drawing of what the gameplay could look like mid-flight.