- Current movement of Player is just for test, it can even get on walls.
  Make better movement, adjusted to animation speed.
- Player collisions with the Scene, don't allow to go outside the scene.
- Footsteps sound.
- Put other actors (rename creatures->actors in code) on scene.
- Design location, player, other actors in CGE editor.

- Game plans:

  1st location: home.
  Object: get rope, get to the othe side of the rift.
  Demo: Shadows. Getting object. Using it.

  2nd location: forest.
  Object: Walk through the forest. If you enter on some area, you fall
    down the rift and you die.
  Demo: paralax. Area larger than screen.

  3rd location: city.
  Object: Find a detonator.

  4rd: city building inside.
  Object: Connect detonator. Blow up. The larger rift opens.

  5th: city follows. The rain is falling.
  Demo: Rain.
