Basic interactivity

In my latest commit I have made it possible to interact with an uninteresting scene. There's not much yet in terms of a game, and production value is pretty much zero. But for those curious about what it is that I'm building, you can already start having an idea. Launch the program and move right and down. Look at the map and at how the histograms update.

Now think, for a moment, about how much you'd hate if you were only allowed to look at the histograms in this game. Welcome to my game. It's horrible.